oj.uz

Submission #443007

# Submission time Handle Problem Language Result Execution time Memory
443007 2021-07-09T13:16:41 Z leaked Marriage questions (IZhO14_marriage) C++14
84 / 100
 1500 ms 3036 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=150;
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 2 ms 1100 KB Output is correct
21 Correct 1 ms 1100 KB Output is correct
22 Correct 2 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 16 ms 1304 KB Output is correct
26 Correct 47 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 72 ms 1240 KB Output is correct
30 Correct 54 ms 1228 KB Output is correct
31 Correct 145 ms 1660 KB Output is correct
32 Correct 532 ms 1416 KB Output is correct
33 Correct 1 ms 1356 KB Output is correct
34 Correct 2 ms 1356 KB Output is correct
35 Correct 233 ms 1988 KB Output is correct
36 Correct 176 ms 1888 KB Output is correct
37 Correct 1141 ms 1972 KB Output is correct
38 Execution timed out 1591 ms 2352 KB Time limit exceeded
39 Correct 14 ms 2124 KB Output is correct
40 Correct 5 ms 2092 KB Output is correct
41 Correct 1390 ms 2252 KB Output is correct
42 Execution timed out 1590 ms 2028 KB Time limit exceeded
43 Execution timed out 1591 ms 2012 KB Time limit exceeded
44 Execution timed out 1592 ms 2760 KB Time limit exceeded
45 Correct 374 ms 2508 KB Output is correct
46 Execution timed out 1583 ms 2888 KB Time limit exceeded
47 Execution timed out 1593 ms 2856 KB Time limit exceeded
48 Execution timed out 1575 ms 2884 KB Time limit exceeded
49 Execution timed out 1588 ms 3036 KB Time limit exceeded
50 Correct 51 ms 2124 KB Output is correct