oj.uz

Submission #443003

# Submission time Handle Problem Language Result Execution time Memory
443003 2021-07-09T13:15:26 Z leaked Marriage questions (IZhO14_marriage) C++14
84 / 100
 1500 ms 3064 KB 
#include <bits/stdc++.h>
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("-O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define vec vector
#define sz(x) ( int)x.size()
#define m_p make_pair
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;
typedef long long ll;
typedef pair<ll, int> pli;
typedef pair<int,ll> pil;
typedef pair<int,int> pii;
typedef unsigned long long ull;
auto rng=bind(uniform_int_distribution<int>(1,1000),mt19937(time(0)));
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
const int N=3e4+1;
const int K=160;
const int M=2001;
vec<int>g[N];
int tt=1;
bool kuhn(int v,vec<int> &u,vec<short> &mt){
    if(u[v]==tt) return 0;
    u[v]=tt;
    for(auto &z : g[v]){
        if(mt[z]==-1){
            mt[z]=v;
            return 1;
        }
    }
    for(auto &z : g[v]){
        if(kuhn(mt[z],u,mt)){
            mt[z]=v;
            return 1;
        }
    }
    return 0;
}
vec<short> mt[N/K+1];
short cnt[N/K+1];
vec<int> u(N,0);
vec<short> cr(M);
int c=0;
int n,m;
bool check(int l,int r){
    if(r/K>0){
        for(int i=0;i<m;i++) cr[i]=mt[r/K-1][i];
        c=cnt[r/K-1];
    }
    else{
        for(int i=0;i<m;i++) cr[i]=-1;
        c=0;
    }
    for(int i=max(l,(r/K)*K);i<=r;i++){
        tt++;
        if(kuhn(i,u,cr)) c++;
    }
    return c==m;
}
void add(int id){
    for(int i=id/K;i<=(n-1)/K;i++){
        tt++;
        cnt[i]+=kuhn(id,u,mt[i]);
    }
}
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int k;
    cin>>n>>m>>k;
    for(int i=0;i<k;i++){
        int v,u;
        cin>>v>>u;--v;--u;
        g[v].pb(u);
    }
    for(int i=0;i<N/K+1;i++){
        mt[i].assign(m,-1);
    }
    for(int j=0;j<m;j++) cr[j]=-1;
    int l=n;
    int h=0;
    while(h!=m && l>0){
        l--;
        tt++;
        h+=kuhn(l,u,cr);
    }
    if(h!=m){
        cout<<0;
        return 0;
    }
    for(int i=n-1;i>l;i--){
        add(i);
    }
    int r=n-1;
    ll ans=0;
    for(int i=l;i>=0;i--){
//        cout<<i<<' '<<r<<endl;
        add(i);
        while(check(i,r-1)) r--;
        ans+=(n-r);
    }
    cout<<ans;
    return 0;
}

/*
5
1 2
2 3
3 4
4 5
5 1
*/

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 1 ms 1100 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 1 ms 1100 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 1 ms 1100 KB Output is correct
12 Correct 1 ms 1100 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 1 ms 1100 KB Output is correct
15 Correct 1 ms 1100 KB Output is correct
16 Correct 1 ms 1100 KB Output is correct
17 Correct 1 ms 1100 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 2 ms 1100 KB Output is correct
20 Correct 1 ms 1100 KB Output is correct
21 Correct 1 ms 1100 KB Output is correct
22 Correct 1 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 1 ms 1100 KB Output is correct
25 Correct 23 ms 1300 KB Output is correct
26 Correct 41 ms 1204 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 1 ms 1100 KB Output is correct
29 Correct 117 ms 1228 KB Output is correct
30 Correct 88 ms 1228 KB Output is correct
31 Correct 249 ms 1636 KB Output is correct
32 Correct 865 ms 1380 KB Output is correct
33 Correct 1 ms 1228 KB Output is correct
34 Correct 2 ms 1356 KB Output is correct
35 Correct 391 ms 1892 KB Output is correct
36 Correct 295 ms 1856 KB Output is correct
37 Correct 1348 ms 1944 KB Output is correct
38 Execution timed out 1579 ms 2312 KB Time limit exceeded
39 Correct 46 ms 1988 KB Output is correct
40 Correct 5 ms 1996 KB Output is correct
41 Correct 895 ms 2152 KB Output is correct
42 Execution timed out 1568 ms 1868 KB Time limit exceeded
43 Execution timed out 1586 ms 2084 KB Time limit exceeded
44 Execution timed out 1559 ms 2540 KB Time limit exceeded
45 Correct 430 ms 2468 KB Output is correct
46 Execution timed out 1564 ms 2800 KB Time limit exceeded
47 Execution timed out 1598 ms 2828 KB Time limit exceeded
48 Execution timed out 1582 ms 2900 KB Time limit exceeded
49 Execution timed out 1582 ms 3064 KB Time limit exceeded
50 Correct 119 ms 1996 KB Output is correct