oj.uz

Submission #443008

# Submission time Handle Problem Language Result Execution time Memory
443008 2021-07-09T13:17:02 Z leaked Marriage questions (IZhO14_marriage) C++14
84 / 100
 1500 ms 3072 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=165;
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 2 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 1 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 18 ms 1292 KB Output is correct
26 Correct 34 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 1 ms 1100 KB Output is correct
29 Correct 80 ms 1252 KB Output is correct
30 Correct 57 ms 1228 KB Output is correct
31 Correct 169 ms 1612 KB Output is correct
32 Correct 982 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 250 ms 1916 KB Output is correct
36 Correct 188 ms 1856 KB Output is correct
37 Correct 1138 ms 1956 KB Output is correct
38 Execution timed out 1510 ms 2316 KB Time limit exceeded
39 Correct 15 ms 1996 KB Output is correct
40 Correct 5 ms 2060 KB Output is correct
41 Correct 1135 ms 2124 KB Output is correct
42 Execution timed out 1586 ms 1992 KB Time limit exceeded
43 Execution timed out 1585 ms 1868 KB Time limit exceeded
44 Execution timed out 1595 ms 2500 KB Time limit exceeded
45 Correct 369 ms 2440 KB Output is correct
46 Execution timed out 1582 ms 2848 KB Time limit exceeded
47 Execution timed out 1591 ms 2836 KB Time limit exceeded
48 Execution timed out 1579 ms 3072 KB Time limit exceeded
49 Execution timed out 1566 ms 3012 KB Time limit exceeded
50 Correct 56 ms 2028 KB Output is correct