oj.uz

Submission #442997

# Submission time Handle Problem Language Result Execution time Memory
442997 2021-07-09T13:09:24 Z leaked Marriage questions (IZhO14_marriage) C++14
62 / 100
 1245 ms 262148 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=sqrt(N)+1;
const int M=2001;
vec<int>g[N];
int tt=1;
bool kuhn(int v,vec<short> &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<short> u(N,0);
vec<short> cr(M);
int c=0;
int n,m;
bool check(int l,int r){
    if(r/K>0){
        cr=mt[r/K-1];
        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
62.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 1 ms 972 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 972 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 1100 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 972 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 2 ms 1132 KB Output is correct
20 Correct 2 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 Runtime error 303 ms 262148 KB Execution killed with signal 9
26 Runtime error 181 ms 262148 KB Execution killed with signal 9
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct
29 Correct 115 ms 1100 KB Output is correct
30 Correct 76 ms 1220 KB Output is correct
31 Runtime error 446 ms 262148 KB Execution killed with signal 9
32 Runtime error 953 ms 262148 KB Execution killed with signal 9
33 Correct 1 ms 1228 KB Output is correct
34 Correct 3 ms 1228 KB Output is correct
35 Runtime error 952 ms 262148 KB Execution killed with signal 9
36 Runtime error 898 ms 262148 KB Execution killed with signal 9
37 Runtime error 279 ms 262148 KB Execution killed with signal 9
38 Runtime error 1245 ms 262148 KB Execution killed with signal 9
39 Runtime error 157 ms 262148 KB Execution killed with signal 9
40 Correct 5 ms 1868 KB Output is correct
41 Runtime error 184 ms 262148 KB Execution killed with signal 9
42 Runtime error 349 ms 262148 KB Execution killed with signal 9
43 Runtime error 354 ms 262148 KB Execution killed with signal 9
44 Runtime error 772 ms 262148 KB Execution killed with signal 9
45 Runtime error 164 ms 262148 KB Execution killed with signal 9
46 Runtime error 456 ms 262148 KB Execution killed with signal 9
47 Runtime error 873 ms 262148 KB Execution killed with signal 9
48 Runtime error 843 ms 262148 KB Execution killed with signal 9
49 Runtime error 677 ms 262148 KB Execution killed with signal 9
50 Runtime error 170 ms 262148 KB Execution killed with signal 9