QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#74116 | #5445. Vulpecula | japan022022 | WA | 88ms | 5240kb | C++17 | 28.5kb | 2023-01-30 20:10:43 | 2023-01-30 20:10:44 |
Judging History
answer
#line 1 "library/my_template.hpp"
#if defined(LOCAL)
#include <my_template_compiled.hpp>
#else
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pi = pair<ll, ll>;
using vi = vector<ll>;
using u32 = unsigned int;
using u64 = unsigned long long;
using i128 = __int128;
template <class T>
using vc = vector<T>;
template <class T>
using vvc = vector<vc<T>>;
template <class T>
using vvvc = vector<vvc<T>>;
template <class T>
using vvvvc = vector<vvvc<T>>;
template <class T>
using vvvvvc = vector<vvvvc<T>>;
template <class T>
using pq = priority_queue<T>;
template <class T>
using pqg = priority_queue<T, vector<T>, greater<T>>;
#define vv(type, name, h, ...) \
vector<vector<type>> name(h, vector<type>(__VA_ARGS__))
#define vvv(type, name, h, w, ...) \
vector<vector<vector<type>>> name( \
h, vector<vector<type>>(w, vector<type>(__VA_ARGS__)))
#define vvvv(type, name, a, b, c, ...) \
vector<vector<vector<vector<type>>>> name( \
a, vector<vector<vector<type>>>( \
b, vector<vector<type>>(c, vector<type>(__VA_ARGS__))))
// https://trap.jp/post/1224/
#define FOR1(a) for (ll _ = 0; _ < ll(a); ++_)
#define FOR2(i, a) for (ll i = 0; i < ll(a); ++i)
#define FOR3(i, a, b) for (ll i = a; i < ll(b); ++i)
#define FOR4(i, a, b, c) for (ll i = a; i < ll(b); i += (c))
#define FOR1_R(a) for (ll i = (a)-1; i >= ll(0); --i)
#define FOR2_R(i, a) for (ll i = (a)-1; i >= ll(0); --i)
#define FOR3_R(i, a, b) for (ll i = (b)-1; i >= ll(a); --i)
#define overload4(a, b, c, d, e, ...) e
#define overload3(a, b, c, d, ...) d
#define FOR(...) overload4(__VA_ARGS__, FOR4, FOR3, FOR2, FOR1)(__VA_ARGS__)
#define FOR_R(...) overload3(__VA_ARGS__, FOR3_R, FOR2_R, FOR1_R)(__VA_ARGS__)
#define FOR_subset(t, s) \
for (ll t = (s); t >= 0; t = (t == 0 ? -1 : (t - 1) & (s)))
#define all(x) x.begin(), x.end()
#define len(x) ll(x.size())
#define elif else if
#define eb emplace_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
#define stoi stoll
int popcnt(int x) { return __builtin_popcount(x); }
int popcnt(u32 x) { return __builtin_popcount(x); }
int popcnt(ll x) { return __builtin_popcountll(x); }
int popcnt(u64 x) { return __builtin_popcountll(x); }
// (0, 1, 2, 3, 4) -> (-1, 0, 1, 1, 2)
int topbit(int x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }
int topbit(u32 x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }
int topbit(ll x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }
int topbit(u64 x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }
// (0, 1, 2, 3, 4) -> (-1, 0, 1, 0, 2)
int lowbit(int x) { return (x == 0 ? -1 : __builtin_ctz(x)); }
int lowbit(u32 x) { return (x == 0 ? -1 : __builtin_ctz(x)); }
int lowbit(ll x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }
int lowbit(u64 x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }
template <typename T, typename U>
T ceil(T x, U y) {
return (x > 0 ? (x + y - 1) / y : x / y);
}
template <typename T, typename U>
T floor(T x, U y) {
return (x > 0 ? x / y : (x - y + 1) / y);
}
template <typename T, typename U>
pair<T, T> divmod(T x, U y) {
T q = floor(x, y);
return {q, x - q * y};
}
template <typename T, typename U>
T SUM(const vector<U> &A) {
T sum = 0;
for (auto &&a: A) sum += a;
return sum;
}
#define MIN(v) *min_element(all(v))
#define MAX(v) *max_element(all(v))
#define LB(c, x) distance((c).begin(), lower_bound(all(c), (x)))
#define UB(c, x) distance((c).begin(), upper_bound(all(c), (x)))
#define UNIQUE(x) \
sort(all(x)), x.erase(unique(all(x)), x.end()), x.shrink_to_fit()
template <typename T>
T POP(deque<T> &que) {
T a = que.front();
que.pop_front();
return a;
}
template <typename T>
T POP(pq<T> &que) {
T a = que.top();
que.pop();
return a;
}
template <typename T>
T POP(pqg<T> &que) {
assert(!que.empty());
T a = que.top();
que.pop();
return a;
}
template <typename T>
T POP(vc<T> &que) {
assert(!que.empty());
T a = que.back();
que.pop_back();
return a;
}
template <typename F>
ll binary_search(F check, ll ok, ll ng) {
assert(check(ok));
while (abs(ok - ng) > 1) {
auto x = (ng + ok) / 2;
tie(ok, ng) = (check(x) ? mp(x, ng) : mp(ok, x));
}
return ok;
}
template <typename F>
double binary_search_real(F check, double ok, double ng, int iter = 100) {
FOR(iter) {
double x = (ok + ng) / 2;
tie(ok, ng) = (check(x) ? mp(x, ng) : mp(ok, x));
}
return (ok + ng) / 2;
}
template <class T, class S>
inline bool chmax(T &a, const S &b) {
return (a < b ? a = b, 1 : 0);
}
template <class T, class S>
inline bool chmin(T &a, const S &b) {
return (a > b ? a = b, 1 : 0);
}
// ? は -1
vc<int> s_to_vi(const string &S, char first_char) {
vc<int> A(S.size());
FOR(i, S.size()) { A[i] = (S[i] != '?' ? S[i] - first_char : -1); }
return A;
}
template <typename T, typename U>
vector<T> cumsum(vector<U> &A, int off = 1) {
int N = A.size();
vector<T> B(N + 1);
FOR(i, N) { B[i + 1] = B[i] + A[i]; }
if (off == 0) B.erase(B.begin());
return B;
}
// stable sort
template <typename T>
vector<int> argsort(const vector<T> &A) {
vector<int> ids(len(A));
iota(all(ids), 0);
sort(all(ids),
[&](int i, int j) { return (A[i] == A[j] ? i < j : A[i] < A[j]); });
return ids;
}
// A[I[0]], A[I[1]], ...
template <typename T>
vc<T> rearrange(const vc<T> &A, const vc<int> &I) {
vc<T> B(len(I));
FOR(i, len(I)) B[i] = A[I[i]];
return B;
}
#endif
#line 1 "library/other/io.hpp"
// based on yosupo's fastio
#include <unistd.h>
namespace fastio {
#define FASTIO
// クラスが read(), print() を持っているかを判定するメタ関数
struct has_write_impl {
template <class T>
static auto check(T &&x) -> decltype(x.write(), std::true_type{});
template <class T>
static auto check(...) -> std::false_type;
};
template <class T>
class has_write : public decltype(has_write_impl::check<T>(std::declval<T>())) {
};
struct has_read_impl {
template <class T>
static auto check(T &&x) -> decltype(x.read(), std::true_type{});
template <class T>
static auto check(...) -> std::false_type;
};
template <class T>
class has_read : public decltype(has_read_impl::check<T>(std::declval<T>())) {};
struct Scanner {
FILE *fp;
char line[(1 << 15) + 1];
size_t st = 0, ed = 0;
void reread() {
memmove(line, line + st, ed - st);
ed -= st;
st = 0;
ed += fread(line + ed, 1, (1 << 15) - ed, fp);
line[ed] = '\0';
}
bool succ() {
while (true) {
if (st == ed) {
reread();
if (st == ed) return false;
}
while (st != ed && isspace(line[st])) st++;
if (st != ed) break;
}
if (ed - st <= 50) {
bool sep = false;
for (size_t i = st; i < ed; i++) {
if (isspace(line[i])) {
sep = true;
break;
}
}
if (!sep) reread();
}
return true;
}
template <class T, enable_if_t<is_same<T, string>::value, int> = 0>
bool read_single(T &ref) {
if (!succ()) return false;
while (true) {
size_t sz = 0;
while (st + sz < ed && !isspace(line[st + sz])) sz++;
ref.append(line + st, sz);
st += sz;
if (!sz || st != ed) break;
reread();
}
return true;
}
template <class T, enable_if_t<is_integral<T>::value, int> = 0>
bool read_single(T &ref) {
if (!succ()) return false;
bool neg = false;
if (line[st] == '-') {
neg = true;
st++;
}
ref = T(0);
while (isdigit(line[st])) { ref = 10 * ref + (line[st++] & 0xf); }
if (neg) ref = -ref;
return true;
}
template <typename T,
typename enable_if<has_read<T>::value>::type * = nullptr>
inline bool read_single(T &x) {
x.read();
return true;
}
bool read_single(double &ref) {
string s;
if (!read_single(s)) return false;
ref = std::stod(s);
return true;
}
bool read_single(char &ref) {
string s;
if (!read_single(s) || s.size() != 1) return false;
ref = s[0];
return true;
}
template <class T>
bool read_single(vector<T> &ref) {
for (auto &d: ref) {
if (!read_single(d)) return false;
}
return true;
}
template <class T, class U>
bool read_single(pair<T, U> &p) {
return (read_single(p.first) && read_single(p.second));
}
template <size_t N = 0, typename T>
void read_single_tuple(T &t) {
if constexpr (N < std::tuple_size<T>::value) {
auto &x = std::get<N>(t);
read_single(x);
read_single_tuple<N + 1>(t);
}
}
template <class... T>
bool read_single(tuple<T...> &tpl) {
read_single_tuple(tpl);
return true;
}
void read() {}
template <class H, class... T>
void read(H &h, T &... t) {
bool f = read_single(h);
assert(f);
read(t...);
}
Scanner(FILE *fp) : fp(fp) {}
};
struct Printer {
Printer(FILE *_fp) : fp(_fp) {}
~Printer() { flush(); }
static constexpr size_t SIZE = 1 << 15;
FILE *fp;
char line[SIZE], small[50];
size_t pos = 0;
void flush() {
fwrite(line, 1, pos, fp);
pos = 0;
}
void write(const char val) {
if (pos == SIZE) flush();
line[pos++] = val;
}
template <class T, enable_if_t<is_integral<T>::value, int> = 0>
void write(T val) {
if (pos > (1 << 15) - 50) flush();
if (val == 0) {
write('0');
return;
}
if (val < 0) {
write('-');
val = -val; // todo min
}
size_t len = 0;
while (val) {
small[len++] = char(0x30 | (val % 10));
val /= 10;
}
for (size_t i = 0; i < len; i++) { line[pos + i] = small[len - 1 - i]; }
pos += len;
}
void write(const string s) {
for (char c: s) write(c);
}
void write(const char *s) {
size_t len = strlen(s);
for (size_t i = 0; i < len; i++) write(s[i]);
}
void write(const double x) {
ostringstream oss;
oss << fixed << setprecision(15) << x;
string s = oss.str();
write(s);
}
void write(const long double x) {
ostringstream oss;
oss << fixed << setprecision(15) << x;
string s = oss.str();
write(s);
}
template <typename T,
typename enable_if<has_write<T>::value>::type * = nullptr>
inline void write(T x) {
x.write();
}
template <class T>
void write(const vector<T> val) {
auto n = val.size();
for (size_t i = 0; i < n; i++) {
if (i) write(' ');
write(val[i]);
}
}
template <class T, class U>
void write(const pair<T, U> val) {
write(val.first);
write(' ');
write(val.second);
}
template <size_t N = 0, typename T>
void write_tuple(const T t) {
if constexpr (N < std::tuple_size<T>::value) {
if constexpr (N > 0) { write(' '); }
const auto x = std::get<N>(t);
write(x);
write_tuple<N + 1>(t);
}
}
template <class... T>
bool write(tuple<T...> tpl) {
write_tuple(tpl);
return true;
}
template <class T, size_t S>
void write(const array<T, S> val) {
auto n = val.size();
for (size_t i = 0; i < n; i++) {
if (i) write(' ');
write(val[i]);
}
}
void write(i128 val) {
string s;
bool negative = 0;
if (val < 0) {
negative = 1;
val = -val;
}
while (val) {
s += '0' + int(val % 10);
val /= 10;
}
if (negative) s += "-";
reverse(all(s));
if (len(s) == 0) s = "0";
write(s);
}
};
Scanner scanner = Scanner(stdin);
Printer printer = Printer(stdout);
void flush() { printer.flush(); }
void print() { printer.write('\n'); }
template <class Head, class... Tail>
void print(Head &&head, Tail &&... tail) {
printer.write(head);
if (sizeof...(Tail)) printer.write(' ');
print(forward<Tail>(tail)...);
}
void read() {}
template <class Head, class... Tail>
void read(Head &head, Tail &... tail) {
scanner.read(head);
read(tail...);
}
} // namespace fastio
using fastio::print;
using fastio::flush;
using fastio::read;
#define INT(...) \
int __VA_ARGS__; \
read(__VA_ARGS__)
#define LL(...) \
ll __VA_ARGS__; \
read(__VA_ARGS__)
#define STR(...) \
string __VA_ARGS__; \
read(__VA_ARGS__)
#define CHAR(...) \
char __VA_ARGS__; \
read(__VA_ARGS__)
#define DBL(...) \
double __VA_ARGS__; \
read(__VA_ARGS__)
#define VEC(type, name, size) \
vector<type> name(size); \
read(name)
#define VV(type, name, h, w) \
vector<vector<type>> name(h, vector<type>(w)); \
read(name)
void YES(bool t = 1) { print(t ? "YES" : "NO"); }
void NO(bool t = 1) { YES(!t); }
void Yes(bool t = 1) { print(t ? "Yes" : "No"); }
void No(bool t = 1) { Yes(!t); }
void yes(bool t = 1) { print(t ? "yes" : "no"); }
void no(bool t = 1) { yes(!t); }
#line 2 "library/alg/monoid/xor_basis.hpp"
template <typename E>
struct Monoid_XorBasis {
using value_type = vector<E>;
using VECT_SP = value_type;
// 破壊的に変更する
static bool add_element(VECT_SP& x, E v) {
for (auto&& e: x) {
if (e == 0 || v == 0) break;
chmin(v, v ^ e);
}
if (v) {
x.eb(v);
return true;
}
return false;
}
static VECT_SP op(const VECT_SP x, const VECT_SP y) {
for (auto v: y) { add_element(x, v); }
return x;
}
static bool isin(E v, const VECT_SP& V) {
for (auto&& w: V) { chmin(v, v ^ w); }
return v == 0;
}
static E get_max(const VECT_SP& V, E xor_val) {
E res = xor_val;
for (auto&& x: V) chmax(res, res ^ x);
return res;
}
static E get_min(const VECT_SP& V, E xor_val) {
E res = xor_val;
for (auto&& x: V) chmin(res, res ^ x);
return res;
}
static constexpr VECT_SP unit() { return VECT_SP{}; };
static constexpr bool commute = true;
};
#line 1 "library/linalg/solve_linear_F2.hpp"
// bitset で高速化している
// (2000, 8000) で 300ms 程度(ABC276H)
template <int MAX_M, typename T = bool>
vvc<T> solve_linear_F2(const int n, const int m, vvc<T> a, vc<T> b) {
using BS = bitset<MAX_M>;
vc<BS> mat(n);
FOR(i, n) FOR(j, m) mat[i][j] = a[i][j];
int rk = 0;
FOR(j, m) {
if (rk == n) break;
if (mat[rk][j] == 0) {
FOR3(i, rk + 1, n) if (mat[i][j] != 0) {
swap(mat[rk], mat[i]);
swap(b[rk], b[i]);
break;
}
}
if (mat[rk][j] == 0) continue;
FOR(i, n) if (i != rk) {
bool c = mat[i][j];
if (c) {
b[i] = b[i] ^ b[rk];
mat[i] ^= mat[rk];
}
}
++rk;
}
FOR3(i, rk, n) if (b[i] != 0) return {};
vc<vc<bool>> res(1, vc<bool>(m));
vc<int> pivot(m, -1);
int p = 0;
FOR(i, rk) {
while (mat[i][p] == 0) ++p;
res[0][p] = b[i];
pivot[p] = i;
}
FOR(j, m) if (pivot[j] == -1) {
vc<bool> x(m);
x[j] = 1;
FOR(k, j) if (pivot[k] != -1) x[k] = mat[pivot[k]][j];
res.eb(x);
}
return res;
}
#line 1 "library/graph/rerooting_dp.hpp"
#line 2 "library/graph/base.hpp"
template <typename T>
struct Edge {
int frm, to;
T cost;
int id;
};
template <typename T = int, bool directed = false>
struct Graph {
int N, M;
using cost_type = T;
using edge_type = Edge<T>;
vector<edge_type> edges;
vector<int> indptr;
vector<edge_type> csr_edges;
vc<int> vc_deg, vc_indeg, vc_outdeg;
bool prepared;
class OutgoingEdges {
public:
OutgoingEdges(const Graph* G, int l, int r) : G(G), l(l), r(r) {}
const edge_type* begin() const {
if (l == r) { return 0; }
return &G->csr_edges[l];
}
const edge_type* end() const {
if (l == r) { return 0; }
return &G->csr_edges[r];
}
private:
const Graph* G;
int l, r;
};
bool is_prepared() { return prepared; }
constexpr bool is_directed() { return directed; }
Graph() : N(0), M(0), prepared(0) {}
Graph(int N) : N(N), M(0), prepared(0) {}
void resize(int n) { N = n; }
void add(int frm, int to, T cost = 1, int i = -1) {
assert(!prepared);
assert(0 <= frm && 0 <= to && to < N);
if (i == -1) i = M;
auto e = edge_type({frm, to, cost, i});
edges.eb(e);
++M;
}
// wt, off
void read_tree(bool wt = false, int off = 1) { read_graph(N - 1, wt, off); }
void read_graph(int M, bool wt = false, int off = 1) {
for (int m = 0; m < M; ++m) {
INT(a, b);
a -= off, b -= off;
if (!wt) {
add(a, b);
} else {
T c;
read(c);
add(a, b, c);
}
}
build();
}
void read_parent(int off = 1) {
for (int v = 1; v < N; ++v) {
INT(p);
p -= off;
add(p, v);
}
build();
}
void build() {
assert(!prepared);
prepared = true;
indptr.assign(N + 1, 0);
for (auto&& e: edges) {
indptr[e.frm + 1]++;
if (!directed) indptr[e.to + 1]++;
}
for (int v = 0; v < N; ++v) { indptr[v + 1] += indptr[v]; }
auto counter = indptr;
csr_edges.resize(indptr.back() + 1);
for (auto&& e: edges) {
csr_edges[counter[e.frm]++] = e;
if (!directed)
csr_edges[counter[e.to]++] = edge_type({e.to, e.frm, e.cost, e.id});
}
}
OutgoingEdges operator[](int v) const {
assert(prepared);
return {this, indptr[v], indptr[v + 1]};
}
vc<int> deg_array() {
if (vc_deg.empty()) calc_deg();
return vc_deg;
}
pair<vc<int>, vc<int>> deg_array_inout() {
if (vc_indeg.empty()) calc_deg_inout();
return {vc_indeg, vc_outdeg};
}
int deg(int v) {
if (vc_deg.empty()) calc_deg();
return vc_deg[v];
}
int in_deg(int v) {
if (vc_indeg.empty()) calc_deg_inout();
return vc_indeg[v];
}
int out_deg(int v) {
if (vc_outdeg.empty()) calc_deg_inout();
return vc_outdeg[v];
}
void debug() {
print("Graph");
if (!prepared) {
print("frm to cost id");
for (auto&& e: edges) print(e.frm, e.to, e.cost, e.id);
} else {
print("indptr", indptr);
print("frm to cost id");
FOR(v, N) for (auto&& e: (*this)[v]) print(e.frm, e.to, e.cost, e.id);
}
}
private:
void calc_deg() {
assert(vc_deg.empty());
vc_deg.resize(N);
for (auto&& e: edges) vc_deg[e.frm]++, vc_deg[e.to]++;
}
void calc_deg_inout() {
assert(vc_indeg.empty());
vc_indeg.resize(N);
vc_outdeg.resize(N);
for (auto&& e: edges) { vc_indeg[e.to]++, vc_outdeg[e.frm]++; }
}
};
#line 3 "library/graph/tree.hpp"
// HLD euler tour をとっていろいろ。
// 木以外、非連結でも dfs 順序や親がとれる。
template <typename GT>
struct Tree {
using Graph_type = GT;
GT &G;
using WT = typename GT::cost_type;
int N;
bool hld;
vector<int> LID, RID, head, V, parent;
vc<int> depth;
vc<WT> depth_weighted;
Tree(GT &G, int r = -1, bool hld = 1)
: G(G),
N(G.N),
hld(hld),
LID(G.N),
RID(G.N),
head(G.N, r),
V(G.N),
parent(G.N, -1),
depth(G.N, -1),
depth_weighted(G.N, 0) {
assert(G.is_prepared());
int t1 = 0;
if (r != -1) {
dfs_sz(r, -1);
dfs_hld(r, t1);
} else {
for (int r = 0; r < N; ++r) {
if (parent[r] == -1) {
head[r] = r;
dfs_sz(r, -1);
dfs_hld(r, t1);
}
}
}
}
void dfs_sz(int v, int p) {
auto &sz = RID;
parent[v] = p;
depth[v] = (p == -1 ? 0 : depth[p] + 1);
sz[v] = 1;
int l = G.indptr[v], r = G.indptr[v + 1];
auto &csr = G.csr_edges;
// 使う辺があれば先頭にする
for (int i = r - 2; i >= l; --i) {
if (hld && depth[csr[i + 1].to] == -1) swap(csr[i], csr[i + 1]);
}
int hld_sz = 0;
for (int i = l; i < r; ++i) {
auto e = csr[i];
if (depth[e.to] != -1) continue;
depth_weighted[e.to] = depth_weighted[v] + e.cost;
dfs_sz(e.to, v);
sz[v] += sz[e.to];
if (hld && chmax(hld_sz, sz[e.to]) && l < i) { swap(csr[l], csr[i]); }
}
}
void dfs_hld(int v, int ×) {
LID[v] = times++;
RID[v] += LID[v];
V[LID[v]] = v;
bool heavy = true;
for (auto &&e: G[v]) {
if (depth[e.to] <= depth[v]) continue;
head[e.to] = (heavy ? head[v] : e.to);
heavy = false;
dfs_hld(e.to, times);
}
}
vc<int> heavy_path_at(int v) {
vc<int> P = {v};
while (1) {
int a = P.back();
for (auto &&e: G[a]) {
if (e.to != parent[a] && head[e.to] == v) {
P.eb(e.to);
break;
}
}
if (P.back() == a) break;
}
return P;
}
int e_to_v(int eid) {
auto e = G.edges[eid];
return (parent[e.frm] == e.to ? e.frm : e.to);
}
int ELID(int v) { return 2 * LID[v] - depth[v]; }
int ERID(int v) { return 2 * RID[v] - depth[v] - 1; }
/* k: 0-indexed */
int LA(int v, int k) {
assert(k <= depth[v]);
while (1) {
int u = head[v];
if (LID[v] - k >= LID[u]) return V[LID[v] - k];
k -= LID[v] - LID[u] + 1;
v = parent[u];
}
}
int LCA(int u, int v) {
for (;; v = parent[head[v]]) {
if (LID[u] > LID[v]) swap(u, v);
if (head[u] == head[v]) return u;
}
}
int lca(int u, int v) { return LCA(u, v); }
int la(int u, int v) { return LA(u, v); }
int subtree_size(int v) { return RID[v] - LID[v]; }
int dist(int a, int b) {
int c = LCA(a, b);
return depth[a] + depth[b] - 2 * depth[c];
}
WT dist(int a, int b, bool weighted) {
assert(weighted);
int c = LCA(a, b);
return depth_weighted[a] + depth_weighted[b] - WT(2) * depth_weighted[c];
}
// a is in b
bool in_subtree(int a, int b) { return LID[b] <= LID[a] && LID[a] < RID[b]; }
int jump(int a, int b, ll k) {
if (k == 1) {
if (a == b) return -1;
return (in_subtree(b, a) ? LA(b, depth[b] - depth[a] - 1) : parent[a]);
}
int c = LCA(a, b);
int d_ac = depth[a] - depth[c];
int d_bc = depth[b] - depth[c];
if (k > d_ac + d_bc) return -1;
if (k <= d_ac) return LA(a, k);
return LA(b, d_ac + d_bc - k);
}
vc<int> collect_child(int v) {
vc<int> res;
for (auto &&e: G[v])
if (e.to != parent[v]) res.eb(e.to);
return res;
}
vc<pair<int, int>> get_path_decomposition(int u, int v, bool edge) {
// [始点, 終点] の"閉"区間列。
vc<pair<int, int>> up, down;
while (1) {
if (head[u] == head[v]) break;
if (LID[u] < LID[v]) {
down.eb(LID[head[v]], LID[v]);
v = parent[head[v]];
} else {
up.eb(LID[u], LID[head[u]]);
u = parent[head[u]];
}
}
if (LID[u] < LID[v]) down.eb(LID[u] + edge, LID[v]);
elif (LID[v] + edge <= LID[u]) up.eb(LID[u], LID[v] + edge);
reverse(all(down));
up.insert(up.end(), all(down));
return up;
}
vc<int> restore_path(int u, int v) {
vc<int> P;
for (auto &&[a, b]: get_path_decomposition(u, v, 0)) {
if (a <= b) {
FOR(i, a, b + 1) P.eb(V[i]);
} else {
FOR_R(i, b, a + 1) P.eb(V[i]);
}
}
return P;
}
};
#line 4 "library/graph/rerooting_dp.hpp"
template <typename TREE, typename Data>
struct Rerooting_dp {
TREE& tree;
vc<Data> dp_1; // 辺 pv に対して、部分木 v
vc<Data> dp_2; // 辺 pv に対して、部分木 p
vc<Data> dp; // すべての v に対して、v を根とする部分木
template <typename F1, typename F2, typename F3>
Rerooting_dp(TREE& tree, F1 f_ee, F2 f_ev, F3 f_ve, const Data unit)
: tree(tree) {
assert(!tree.G.is_directed());
build(f_ee, f_ev, f_ve, unit);
}
// v を根としたときの full tree
Data operator[](int v) { return dp[v]; }
// root を根としたときの部分木 v
Data get(int root, int v) {
if (root == v) return dp[v];
if (!tree.in_subtree(root, v)) { return dp_1[v]; }
int w = tree.jump(v, root, 1);
return dp_2[w];
}
template <typename F1, typename F2, typename F3>
void build(F1 f_ee, F2 f_ev, F3 f_ve, const Data unit) {
int N = tree.G.N;
dp_1.assign(N, unit);
dp_2.assign(N, unit);
dp.assign(N, unit);
auto& V = tree.V;
auto& par = tree.parent;
FOR_R(i, N) {
int v = V[i];
auto ch = tree.collect_child(v);
int n = len(ch);
vc<Data> Xl(n + 1, unit), Xr(n + 1, unit);
FOR(i, n) Xl[i + 1] = f_ee(Xl[i], dp_2[ch[i]]);
FOR_R(i, n) Xr[i] = f_ee(dp_2[ch[i]], Xr[i + 1]);
FOR(i, n) dp_2[ch[i]] = f_ee(Xl[i], Xr[i + 1]);
dp[v] = Xr[0];
dp_1[v] = f_ev(dp[v], v);
for (auto&& e: tree.G[v]) {
if (e.to == par[v]) { dp_2[v] = f_ve(dp_1[v], e); }
}
}
{
int v = V[0];
dp[v] = f_ev(dp[v], v);
for (auto&& e: tree.G[v]) dp_2[e.to] = f_ev(dp_2[e.to], v);
}
FOR(i, N) {
int v = V[i];
for (auto&& e: tree.G[v]) {
if (e.to == par[v]) continue;
Data x = f_ve(dp_2[e.to], e);
for (auto&& f: tree.G[e.to]) {
if (f.to == par[e.to]) continue;
dp_2[f.to] = f_ee(dp_2[f.to], x);
dp_2[f.to] = f_ev(dp_2[f.to], e.to);
}
x = f_ee(dp[e.to], x);
dp[e.to] = f_ev(x, e.to);
}
}
}
};
#line 6 "main.cpp"
const int LOG = 64;
template <int MAX_N, typename T = bool>
vvc<T> mat_inv_F2(vvc<T> a) {
const int N = len(a);
using BS = bitset<MAX_N>;
vc<BS> A(N), B(N);
FOR(i, N) FOR(j, N) if (a[i][j]) A[i][j] = 1;
FOR(n, N) B[n][n] = 1;
FOR(i, N) {
FOR(k, i, N) if (A[k][i] != 0) {
if (k != i) { swap(A[i], A[k]), swap(B[i], B[k]); }
break;
}
if (A[i][i] == 0) return {};
FOR(k, N) if (i != k) {
if (!A[k][i]) continue;
A[k] ^= A[i];
B[k] ^= B[i];
}
}
vv(T, b, N, N);
FOR(i, N) FOR(j, N) if (B[i][j]) b[i][j] = 1;
return b;
}
void solve() {
using Mono = Monoid_XorBasis<u64>;
using SP = Mono::value_type;
LL(N);
Graph<bool, 0> G(N);
FOR(v, 1, N) {
INT(p);
G.add(--p, v);
}
G.build();
Tree<decltype(G)> tree(G);
vc<SP> space(N);
vc<SP> dual(N);
FOR(v, N) {
INT(n);
SP x = Mono::unit();
FOR(n) {
u64 e;
read(e);
Mono::add_element(x, e);
}
space[v] = x;
}
FOR(v, N) {
auto& X = space[v];
int h = len(X), w = LOG;
vv(bool, mat, h, w);
FOR(i, h) FOR(j, w) {
if (X[i] >> j & 1) mat[i][j] = 1;
}
auto res = solve_linear_F2<LOG>(h, w, mat, vc<bool>(h, 0));
res.erase(res.begin());
assert(len(res) == w - h);
SP Y = Mono::unit();
FOR(i, len(res)) {
u64 x = 0;
FOR(j, LOG) {
if (res[i][j]) x |= u64(1) << j;
}
Mono::add_element(Y, x);
}
dual[v] = Y;
}
/*
木 dp の状態
・深さ d のときに dual space に a が追加される (d,a) というイベントの列
・高々 64
*/
using P = pair<int, u64>;
using Data = vc<P>;
Data unit = {};
auto shrink = [&](Data x) -> Data {
sort(all(x));
Data res;
SP V = Mono::unit();
for (auto&& [d, a]: x) {
if (Mono::add_element(V, a)) res.eb(d, a);
}
return res;
};
auto fee = [&](Data x, Data y) -> Data {
x.insert(x.end(), all(y));
return shrink(x);
};
auto fev = [&](Data x, int v) -> Data {
for (auto&& a: dual[v]) { x.eb(0, a); }
return shrink(x);
};
// e は v から出る有向辺
auto fve = [&](Data x, auto& e) -> Data {
for (auto&& [d, a]: x) ++d;
return x;
};
Rerooting_dp<decltype(tree), Data> dp(tree, fee, fev, fve, unit);
FOR(v, N) {
auto event = dp[v];
// full space にしておく
FOR(i, LOG) event.eb(N, u64(1) << i);
event = shrink(event);
assert(len(event) == LOG);
vv(bool, mat, LOG, LOG);
FOR(i, LOG) FOR(j, LOG) mat[i][j] = (event[i].se >> j) & 1;
mat = mat_inv_F2<64>(mat);
FOR(j, LOG) {
u64 x = 0;
FOR(i, LOG) if (mat[i][j]) x |= u64(1) << i;
event[j].se = x;
}
u64 ANS = 0;
SP X = Mono::unit();
FOR_R(i, 1, LOG) {
u64 x = event[i].se;
Mono::add_element(X, x);
int t1 = event[i - 1].fi, t2 = event[i].fi;
if (t1 < t2) {
u64 ans = Mono::get_max(X, 0);
ANS += ans * u64(t2 - t1);
}
}
print(ANS);
}
}
signed main() {
solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 2ms
memory: 3576kb
input:
2 1 2 2 3 2 1 1
output:
4 2
result:
ok 2 lines
Test #2:
score: 0
Accepted
time: 0ms
memory: 3440kb
input:
5 1 2 2 3 3 83 75 58 4 125 124 58 16 4 39 125 71 112 3 69 66 5 4 48 73 69 6
output:
171 125 183 142 243
result:
ok 5 lines
Test #3:
score: 0
Accepted
time: 2ms
memory: 3532kb
input:
2 1 0 0
output:
0 0
result:
ok 2 lines
Test #4:
score: -100
Wrong Answer
time: 88ms
memory: 5240kb
input:
500 1 2 3 2 1 2 6 2 4 6 6 10 7 12 7 9 8 10 12 20 12 19 15 24 25 23 25 22 29 29 28 26 31 25 34 31 35 33 39 37 36 42 37 37 41 43 42 46 45 45 49 52 53 50 46 50 49 52 58 57 57 61 57 59 56 65 63 59 66 65 63 70 70 68 72 71 73 72 72 76 72 75 80 76 76 82 83 80 89 89 91 85 85 90 89 89 89 92 93 91 92 93 98 96...
output:
18434153946472599290 17931933346714042066 17916198204903720384 17916198204176061150 17931933346710961779 18445169471807930489 17931926407666058065 18445169471807930349 17931933346714042064 17916198204176061020 18445169471807930489 18446738828973977866 17916198204176061018 17931926407666058065 184467...
result:
wrong answer 1st lines differ - expected: '18434153946472599289', found: '18434153946472599290'