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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#68529 | #5109. Spider Walk | nocriz# | WA | 3501ms | 414176kb | C++17 | 10.0kb | 2022-12-17 00:03:39 | 2022-12-17 00:03:40 |
Judging History
answer
// 苔花如米小,也学牡丹开。
// Zhikun Wang (nocriz)
// 敢问路在何方 路在脚下
#include <bits/stdc++.h>
using namespace std;
using ll = long long; using db = long double; using str = string;
using pi = pair<int,int>; using pl = pair<ll,ll>; using pd = pair<db,db>;
using vi = vector<int>; using vb = vector<bool>; using vl = vector<ll>;
using vd = vector<db>; using vs = vector<str>;
using vpi = vector<pi>; using vpl = vector<pl>; using vpd = vector<pd>;
#define tcT template<class T
#define tcTU tcT, class U
tcT> using V = vector<T>; tcT, size_t SZ> using AR = array<T,SZ>; tcT> using PR = pair<T,T>;
#define mp make_pair
#define f first
#define s second
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pb push_back
#define eb emplace_back
#define pf push_front
#define lb lower_bound
#define ub upper_bound
tcT> int lwb(V<T>& a, const T& b) { return int(lb(all(a),b)-bg(a)); }
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define each(a,x) for (auto& a: x)
const int MOD = 998244353;
const ll INF = 1e18; // not too close to LLONG_MAX
const db PI = acos((db)-1);
const int dx[4] = {-1, 0, 1, 0}, dy[4] = {0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
constexpr int pct(int x) { return __builtin_popcount(x); } // # of bits set
constexpr int bits(int x) { return x == 0 ? 0 : 31-__builtin_clz(x); } // floor(log2(x))
constexpr int p2(int x) { return 1<<x; }
constexpr int msk2(int x) { return p2(x)-1; }
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
tcT> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
tcT> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
tcTU> T fstTrue(T lo, T hi, U f) { hi ++; assert(lo <= hi); while (lo < hi) { T mid = lo+(hi-lo)/2; f(mid) ? hi = mid : lo = mid+1; } return lo; }
tcTU> T lstTrue(T lo, T hi, U f) { lo --; assert(lo <= hi); while (lo < hi) { T mid = lo+(hi-lo+1)/2; f(mid) ? lo = mid : hi = mid-1; } return lo; }
tcT> void remDup(vector<T>& v) { sort(all(v)); v.erase(unique(all(v)),end(v)); }
tcTU> void erase(T& t, const U& u) { auto it = t.find(u); assert(it != end(t)); t.erase(it); }
#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;}
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); tcT> typename enable_if<is_readable_v<T>,void>::type re(T& x) { cin >> x; } tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; } tcT> typename enable_if<needs_input_v<T>,void>::type re(T& i); tcTU> void re(pair<T,U>& p) { re(p.f,p.s); } 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...); }}
inline namespace ToString { tcT> constexpr bool needs_output_v = !is_printable_v<T> && is_iterable_v<T>; tcT> typename enable_if<is_printable_v<T>,str>::type ts(T v) { stringstream ss; ss << fixed << setprecision(15) << v; return ss.str(); } tcT> str bit_vec(T t) { str res = "{"; F0R(i,sz(t)) res += ts(t[i]); res += "}"; return res; } str ts(V<bool> v) { return bit_vec(v); } template<size_t SZ> str ts(bitset<SZ> b) { return bit_vec(b); } tcTU> str ts(pair<T,U> p); tcT> typename enable_if<needs_output_v<T>,str>::type ts(T v); tcTU> str ts(pair<T,U> p) { return "("+ts(p.f)+", "+ts(p.s)+")"; } tcT> typename enable_if<is_iterable_v<T>,str>::type ts_sep(T v, str 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,", ")+"}"; } template<int, class T> typename enable_if<!needs_output_v<T>,vs>::type ts_lev(const T& v) { return {ts(v)}; } template<int lev, class T> typename enable_if<needs_output_v<T>,vs>::type ts_lev(const T& v) { if (lev == 0 || !sz(v)) return {ts(v)}; vs res; for (const auto& t: v) { if (sz(res)) res.bk += ","; vs tmp = ts_lev<lev-1>(t); res.ins(end(res),all(tmp)); } F0R(i,sz(res)) { str bef = " "; if (i == 0) bef = "{"; res[i] = bef+res[i]; } res.bk += "}"; return res; } }
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...); } template<class ...T> void pr(const T&... t) { pr_sep(cout,"",t...); } void ps() { cout << "\n"; } template<class ...T> void ps(const T&... t) { pr_sep(cout," ",t...); ps(); } 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; } }
#ifdef LOCAL
#define dbg(...) loc_info(__LINE__,#__VA_ARGS__), dbg_out(__VA_ARGS__)
#define dbgl(lev,x) loc_info(__LINE__,#x), dbgl_out<lev>(x)
#else
#define dbg(...) 0
#define dbgl(lev,x) 0
#endif
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__);
template<int MOD, int RT> struct mint {
static const int mod = MOD;
static constexpr mint rt() { return RT; } // primitive root for FFT
int v; explicit operator int() const { return v; } // explicit -> don't silently convert to int
mint() { v = 0; }
mint(ll _v) { v = int((-MOD < _v && _v < MOD) ? _v : _v % MOD);
if (v < 0) v += MOD; }
friend bool operator==(const mint& a, const mint& b) {
return a.v == b.v; }
friend bool operator!=(const mint& a, const mint& b) {
return !(a == b); }
friend bool operator<(const mint& a, const mint& b) {
return a.v < b.v; }
friend void re(mint& a) { ll x; re(x); a = mint(x); }
friend str ts(mint a) { return ts(a.v); }
mint& operator+=(const mint& m) {
if ((v += m.v) >= MOD) v -= MOD;
return *this; }
mint& operator-=(const mint& m) {
if ((v -= m.v) < 0) v += MOD;
return *this; }
mint& operator*=(const mint& m) {
v = int((ll)v*m.v%MOD); return *this; }
mint& operator/=(const mint& m) { return (*this) *= inv(m); }
friend mint pow(mint a, ll p) {
mint ans = 1; assert(p >= 0);
for (; p; p /= 2, a *= a) if (p&1) ans *= a;
return ans; }
friend mint inv(const mint& a) { assert(a.v != 0);
return pow(a,MOD-2); }
mint operator-() const { return mint(-v); }
mint& operator++() { return *this += 1; }
mint& operator--() { return *this -= 1; }
friend mint operator+(mint a, const mint& b) { return a += b; }
friend mint operator-(mint a, const mint& b) { return a -= b; }
friend mint operator*(mint a, const mint& b) { return a *= b; }
friend mint operator/(mint a, const mint& b) { return a /= b; }
};
typedef mint<MOD,5> mi; // 5 is primitive root for both common mods
typedef vector<mi> vmi;
typedef pair<mi,mi> pmi;
typedef vector<pmi> vpmi;
vmi facs_1926 = {1};
mi fac(int n){
if(n<0)return 0;
while(facs_1926.size()<n+10)
facs_1926.pb(facs_1926.back()*facs_1926.size());
return facs_1926[n];
}
mi C(int n,int m){
if(n<0 || m<0 || n-m<0)return 0;
return fac(n)/fac(m)/fac(n-m);
}
int n, m, s, ans[200020];
set<int> crit[200020];
map<int, int> br[200020];
map<pi, int> dis;
set<pi> inq;
int inf = 1e9+10;
int main() {
re(n,m,s);
s--;
for(int i=0;i<m;i++){
int d, t;
re(d,t);
t--;
int nxt = (t+1)%n;
br[t][d] = nxt;
br[nxt][d] = t;
}
for(int i=0;i<n;i++){
ans[i] = inf;
crit[i].insert(inf);
for (int j = -1;j < 2;j++) {
for (auto ct: br[(i+j+n)%n]) {
crit[i].insert(ct.f);
}
}
}
deque<pi> Q;
pi S = mp(s, inf);
Q.push_back(S);
inq.insert(S);
dis[S] = 0;
while(!Q.empty()){
pi A = Q.front(); Q.pop_front();
int ct = A.f, cd = A.s;
if(crit[(ct+1)%n].count(cd)) {
pi N = mp((ct+1)%n, cd);
if (!inq.count(N)){
inq.insert(N);
dis[N] = dis[A] + 1;
Q.push_back(N);
}
}
if(crit[(ct+n-1)%n].count(cd)) {
pi N = mp((ct+n-1)%n, cd);
if (!inq.count(N)){
inq.insert(N);
dis[N] = dis[A] + 1;
Q.push_back(N);
}
}
set<int>::iterator it = crit[ct].lower_bound(cd);
if(it == crit[ct].begin()){
ans[ct] = dis[A];
continue;
}
it--;
int nd = *it;
if (br[ct].count(nd)) {
pi N = mp(br[ct][nd], nd);
if (inq.count(N) && dis[N] <= dis[A]) continue;
inq.insert(N);
dis[N] = dis[A];
Q.push_front(N);
continue;
}
pi N = mp(ct, nd);
if (inq.count(N) && dis[N] <= dis[A]) continue;
inq.insert(N);
dis[N] = dis[A];
Q.push_front(N);
}
for(int i=0;i<n;i++){
ps(ans[i]);
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1935ms
memory: 414176kb
input:
200000 500000 116205 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50...
output:
2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...
result:
ok 200000 lines
Test #2:
score: -100
Wrong Answer
time: 3501ms
memory: 413704kb
input:
200000 500000 200000 1 148896 2 178903 3 36800 4 98361 5 79634 6 29266 7 51632 8 166082 9 66246 10 145043 11 41644 12 81858 13 87530 14 199625 15 127160 16 49786 17 181673 18 48403 19 30274 20 101455 21 105100 22 52149 23 22810 24 79308 25 191579 26 96365 27 154697 28 45255 29 64965 30 192604 31 330...
output:
1 0 1 1 2 2 3 3 4 10 10 11 11 11 12 13 13 14 15 14 15 18 19 20 22 22 22 21 22 24 23 24 24 25 26 27 28 29 35 35 34 35 35 36 39 40 40 41 41 42 48 48 49 49 50 53 54 54 55 55 56 60 61 61 62 63 63 63 64 64 64 65 73 72 73 74 75 76 76 76 77 78 77 78 79 80 82 83 83 84 84 85 85 86 87 88 89 93 93 94 94 95 95 ...
result:
wrong answer 10th lines differ - expected: '5', found: '10'