QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#388091 | #4589. White-Black Tree | kevinyang# | WA | 0ms | 3892kb | C++20 | 8.9kb | 2024-04-13 11:25:39 | 2024-04-13 11:25:42 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
/* Macros {{{ */
/* A lot of this is from some of Benq's submissions
[https://codeforces.com/profile/Benq]
Ugly af to the eyes, but with vim fold its barable
Hopefully c++20 concepts can make all this stuff must cleaner */
/* Basics {{{ */
using ll = long long;
using ld = long double;
using str = string;
using pi = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
#define mp make_pair
#define fi first
#define se second
#define arr array
#define ve vector
using vi = vector<int>;
using vll = vector<ll>;
using vld = vector<ld>;
using vpi = vector<pi>;
using vpll = vector<pll>;
using vpld = vector<pld>;
using vvi = vector<vi>;
using vvll = vector<vll>;
using vvld = vector<vld>;
using vvpi = vector<vpi>;
using vvpll = vector<vpll>;
using vvpld = vector<vpld>;
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define sz size()
#define rsz(a) resize(a)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define For(i, a, b) for (int i = a; i < b; ++i)
#define Rof(i, a, b) for (int i = (b)-1; i >= (a); --i)
#define rep(a) For(_, 0, a)
#define each(a, x) for (auto &a : x)
#define reach(a, x) for (auto a = x.rbegin(); a != x.rend(); ++a)
template <typename T, typename U>
inline void cmin(T &x, U y) {
if (y < x) x = y;
}
template <typename T, typename U>
inline void cmax(T &x, U y) {
if (x < y) x = y;
}
/*}}}*/
/* IO {{{ */
/* Template Macros {{{ */
#define tcT template <class T
#define tcTU tcT, class U
#define tcTUU tcT, class... U
/*}}}*/
inline namespace Helpers { /*{{{*/
tcT, class = void > struct is_iterable : false_type {};
tcT > struct is_iterable<
T, void_t<decltype(begin(declval<T>())), decltype(end(declval<T>()))>>
: true_type {};
tcT > constexpr bool is_iterable_v = is_iterable<T>::value;
tcT, class = void > struct is_readable : false_type {};
tcT > struct is_readable<T, typename std::enable_if_t<is_same_v<
decltype(cin >> declval<T &>()), istream &>>>
: true_type {};
tcT > constexpr bool is_readable_v = is_readable<T>::value;
tcT, class = void > struct is_printable : false_type {};
tcT > struct is_printable<T, typename std::enable_if_t<is_same_v<
decltype(cout << declval<T>()), ostream &>>>
: true_type {};
tcT > constexpr bool is_printable_v = is_printable<T>::value;
} /* namespace Helpers */
/*}}}*/
inline namespace Input { /*{{{*/
tcT > constexpr bool needs_input_v = !is_readable_v<T> && is_iterable_v<T>;
tcTUU > void re(T &t, U &...u);
tcTU > void re(pair<T, U> &p); /* pairs */
/* re: read{{{ */
tcT > typename enable_if<is_readable_v<T>, void>::type re(T &x) {
cin >> x;
} /* default */
tcT > typename enable_if<needs_input_v<T>, void>::type re(
T &i); // vectors, arrays, etc...
tcTU > void re(pair<T, U> &p) { re(p.fi, p.se); } // pairs
tcT > typename enable_if<needs_input_v<T>, void>::type re(T &i) {
each(x, i) re(x);
}
tcTUU > void re(T &t, U &...u) {
re(t);
re(u...);
} /* read multiple}}} */
/* rv: resize and read vectors{{{ */
void rv(size_t) {}
tcTUU > void rv(size_t N, ve<T> &t, U &...u);
template <class... U>
void rv(size_t, size_t N2, U &...u);
tcTUU > void rv(size_t N, ve<T> &t, U &...u) {
t.rsz(N);
re(t);
rv(N, u...);
}
template <class... U>
void rv(size_t, size_t N2, U &...u) {
rv(N2, u...);
} /*}}}*/
/* dumb shortcuts to read in ints{{{ */
void decrement() {} /* subtract one from each */
tcTUU > void decrement(T &t, U &...u) {
--t;
decrement(u...);
}
#define ints(...) \
int __VA_ARGS__; \
re(__VA_ARGS__);
#define int1(...) \
ints(__VA_ARGS__); \
decrement(__VA_ARGS__); /*}}}*/
} /* namespace Input */
/*}}}*/
inline namespace ToString { /*{{{*/
tcT > constexpr bool needs_output_v = !is_printable_v<T> && is_iterable_v<T>;
/* ts: string representation to print */
tcT > typename enable_if<is_printable_v<T>, str>::type ts(T v) {
stringstream ss;
ss << fixed << setprecision(15) << v;
return ss.str();
} /* default */
tcT > str bit_vec(T t) { /* bit vector to string */
str res = "{";
For(i, 0, t.sz) res += ts(t[i]);
res += "}";
return res;
}
str ts(ve<bool> v) { return bit_vec(v); }
template <size_t SZ>
str ts(bitset<SZ> b) {
return bit_vec(b);
} /* bit vector */
tcTU > str ts(pair<T, U> p); /* pairs */
tcT > typename enable_if<needs_output_v<T>, str>::type ts(
T v); /* vectors, arrays */
tcTU > str ts(pair<T, U> p) { return "(" + ts(p.fi) + ", " + ts(p.se) + ")"; }
tcT > typename enable_if<is_iterable_v<T>, str>::type ts_sep(T v, str sep) {
/* convert container to string w/ separator sep */
bool fst = 1;
str res = "";
for (const auto &x : v) {
if (!fst) res += sep;
fst = 0;
res += ts(x);
}
return res;
}
tcT > typename enable_if<needs_output_v<T>, str>::type ts(T v) {
return "{" + ts_sep(v, ", ") + "}";
}
/* for nested DS */
template <int, class T>
typename enable_if<!needs_output_v<T>, ve<str>>::type ts_lev(const T &v) {
return {ts(v)};
}
template <int lev, class T>
typename enable_if<needs_output_v<T>, ve<str>>::type ts_lev(const T &v) {
if (lev == 0 || !v.sz) return {ts(v)};
ve<str> res;
for (const auto &t : v) {
if (res.sz) res.back() += ",";
ve<str> tmp = ts_lev<lev - 1>(t);
res.insert(end(res), all(tmp));
}
For(i, 0, res.sz) {
str bef = " ";
if (i == 0) bef = "{";
res[i] = bef + res[i];
}
res.back() += "}";
return res;
}
} /* namespace ToString */
/*}}}*/
inline namespace Output { /*{{{*/
template <class T>
void pr_sep(ostream &os, str, const T &t) {
os << ts(t);
}
template <class T, class... U>
void pr_sep(ostream &os, str sep, const T &t, const U &...u) {
pr_sep(os, sep, t);
os << sep;
pr_sep(os, sep, u...);
}
/* print w/ no spaces */
template <class... T>
void pr(const T &...t) {
pr_sep(cout, "", t...);
}
/* print w/ spaces, end with newline */
void ps() { cout << "\n"; }
template <class... T>
void ps(const T &...t) {
pr_sep(cout, " ", t...);
ps();
}
/* debug to cerr */
template <class... T>
void dbg_out(const T &...t) {
pr_sep(cerr, " | ", t...);
cerr << endl;
}
void loc_info(int line, str names) {
cerr << "Line(" << line << ") -> [" << names << "]: ";
}
template <int lev, class T>
void dbgl_out(const T &t) {
cerr << "\n\n" << ts_sep(ts_lev<lev>(t), "\n") << "\n" << endl;
}
} /* namespace Output */
/*}}}}}}}}}*/
int n;
vi p, c;
vvi adj;
vll vals;
arr<ll, 2> dfs(int r) { // returns { grundy, max_possible_grundy }
if(adj[r].sz == 0) return { c[r], 1 };
vll chld_grundys, chld_mx_grundys;
for(auto c : adj[r]) {
auto [a, b] = dfs(c);
chld_grundys.pb(a);
chld_mx_grundys.pb(b);
}
vi feq(64, 0);
for(auto v : chld_mx_grundys) {
while(v > 0) {
++feq[__builtin_ctz(v)];
v -= (v&-v);
}
}
ll mx_chld_xor = 0;
for(int i=63; i>=0; --i) {
if(feq[i] == 1) mx_chld_xor += (1<<i);
if(feq[i] >= 2) {
mx_chld_xor += ((1<<(i+1))-1);
break;
}
}
// ll mx_possible_grundy = accumulate(all(chld_mx_grundys), 0ll) + 1 + mx_chld_xor;
ll mx_possible_grundy = *max_element(all(chld_mx_grundys)) + 1 + mx_chld_xor;
ll cur_grundy;
// if(c[r]) cur_grundy = accumulate(all(chld_grundys), 0ll) + 1 + mx_chld_xor;
if(c[r]) cur_grundy = *max_element(all(chld_grundys)) + 1 + mx_chld_xor;
else cur_grundy = accumulate(all(chld_grundys), 0ll, bit_xor{});
// grundy if c[r] is black is xor of children grundy values
// grundy if c[r] is white is
// sum of children grundy values
// plus 1
// plus max xor of children grundy values
// max possible grundy should be
// sum of children max possible grundys
// plus 1
// plus max xor possible of children grundys
return { cur_grundy, mx_possible_grundy };
}
void solve() {
re(n), rv(n-1, p), rv(n, c);
p.insert(p.begin(), 2, 1);
c.insert(c.begin(), 0);
adj.assign(n+1, vi());
for(int i=2; i<=n; ++i) adj[p[i]].pb(i);
ps(dfs(1)[0] ? "First" : "Second");
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
/* cout << fixed << setprecision(6); */
int t = 1;
// cin >> t;
for (int i = 0; i < t; i++) solve();
return 0;
// you should actually read the stuff at the bottom
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3596kb
input:
7 1 1 1 3 3 3 0 1 1 0 0 0 1
output:
First
result:
ok single line: 'First'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
5 1 1 2 3 0 1 1 0 0
output:
Second
result:
ok single line: 'Second'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
4 1 1 1 1 1 0 1
output:
First
result:
ok single line: 'First'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
2 1 0 0
output:
Second
result:
ok single line: 'Second'
Test #5:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
3 1 2 0 1 1
output:
First
result:
ok single line: 'First'
Test #6:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
3 1 2 1 1 1
output:
First
result:
ok single line: 'First'
Test #7:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
3 1 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #8:
score: 0
Accepted
time: 0ms
memory: 3892kb
input:
3 1 1 0 1 0
output:
First
result:
ok single line: 'First'
Test #9:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
3 1 1 0 1 1
output:
Second
result:
ok single line: 'Second'
Test #10:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
4 1 1 2 0 1 1 0
output:
First
result:
ok single line: 'First'
Test #11:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
4 1 1 1 0 1 1 1
output:
First
result:
ok single line: 'First'
Test #12:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
4 1 2 3 0 1 0 1
output:
First
result:
ok single line: 'First'
Test #13:
score: 0
Accepted
time: 0ms
memory: 3652kb
input:
5 1 1 2 2 0 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #14:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
5 1 1 2 2 0 0 1 0 1
output:
Second
result:
ok single line: 'Second'
Test #15:
score: 0
Accepted
time: 0ms
memory: 3660kb
input:
2 1 1 0
output:
First
result:
ok single line: 'First'
Test #16:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
5 1 1 2 2 0 1 1 0 0
output:
First
result:
ok single line: 'First'
Test #17:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
5 1 1 1 2 0 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #18:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
5 1 1 1 2 0 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #19:
score: 0
Accepted
time: 0ms
memory: 3648kb
input:
5 1 1 2 3 0 1 1 1 1
output:
Second
result:
ok single line: 'Second'
Test #20:
score: 0
Accepted
time: 0ms
memory: 3716kb
input:
5 1 1 2 3 0 1 1 1 0
output:
First
result:
ok single line: 'First'
Test #21:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
6 1 1 1 3 3 0 1 0 1 1 1
output:
Second
result:
ok single line: 'Second'
Test #22:
score: 0
Accepted
time: 0ms
memory: 3660kb
input:
6 1 1 1 3 3 0 1 1 0 1 1
output:
First
result:
ok single line: 'First'
Test #23:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
8 1 2 3 4 5 6 7 0 1 1 1 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #24:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
10 1 1 1 2 3 4 5 6 7 0 1 1 1 1 1 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #25:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
15 1 1 2 2 3 3 4 4 5 5 6 6 7 7 0 1 0 0 1 0 0 0 0 0 0 0 0 0 1
output:
First
result:
ok single line: 'First'
Test #26:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
2 1 0 1
output:
First
result:
ok single line: 'First'
Test #27:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
13 1 1 1 2 3 4 5 6 7 8 9 10 0 1 1 1 1 1 1 1 1 1 1 1 1
output:
First
result:
ok single line: 'First'
Test #28:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
output:
First
result:
ok single line: 'First'
Test #29:
score: -100
Wrong Answer
time: 0ms
memory: 3656kb
input:
33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
output:
Second
result:
wrong answer 1st lines differ - expected: 'First', found: 'Second'