oj.uz

Submission #443021

# Submission time Handle Problem Language Result Execution time Memory
443021 2021-07-09T13:35:51 Z leaked Marriage questions (IZhO14_marriage) C++14
20 / 100
 151 ms 4676 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[M];
vec<int>gr[N];
int uk;
int vl[N];
int mt[N];
int wh[N];
int u[N],tt,n,m;
int tl,tr;
bool kuhn(int v){
    if(u[v]==tt) return 0;
    u[v]=tt;
    for(auto &z : g[v]){
        if(z<=tr && mt[z]==-1){
            mt[z]=v;
            vl[uk++]=v;
            return 1;
        }
    }
    for(auto &z : g[v]){
        if(z<=tr && kuhn(mt[z])){
            mt[z]=v;
            vl[uk++]=v;
            return 1;
        }
    }
    return 0;
}
int check(int l,int r){
    tl=l;tr=r;
    for(int i=0;i<uk;i++){
        mt[vl[i]]=-1;
    }
    uk=0;
    for(int i=0;i<m;i++){
        tt++;
        if(!kuhn(i)) return 0;
    }
    return 1;
}
bool kuhn2(int v){
    if(u[v]==tt) return 0;
    u[v]=tt;
    for(auto &z : gr[v]){
        if(mt[z]==-1){
            mt[z]=v;
            return 1;
        }
    }
    for(auto &z : gr[v]){
        if(kuhn(mt[z])){
            mt[z]=v;
            return 1;
        }
    }
    return 0;
}
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;
        gr[v].pb(u);
    }
    for(int i=0;i<N;i++){
        mt[i]=-1;
        wh[i]=-1;
    }
    int l=n;
    int h=0;
    while(h!=m && l>0){
        l--;
        tt++;
        h+=kuhn2(l);
    }
    if(h!=m){
        cout<<0;
        return 0;
    }
    fill(mt,mt+n,-1);
    for(int i=n-1;i>l;i--){
        for(auto &z : gr[i]) g[z].pb(i);
    }
    int r=n-1;
    ll ans=0;
    for(int i=l;i>=0;i--){
//        cout<<i<<endl;
        for(auto &z : gr[i]) g[z].pb(i);
        while(check(i,r-1)) r--;
//        cout<<i<<' '<<r<<endl;
        ans+=(n-r);
    }
    cout<<ans;
    return 0;
}

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

Subtask #1
20.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 1228 KB Output isn't correct
2 Incorrect 1 ms 1228 KB Output isn't correct
3 Incorrect 1 ms 1228 KB Output isn't correct
4 Incorrect 1 ms 1228 KB Output isn't correct
5 Correct 1 ms 1228 KB Output is correct
6 Correct 1 ms 1228 KB Output is correct
7 Incorrect 1 ms 1228 KB Output isn't correct
8 Correct 1 ms 1228 KB Output is correct
9 Correct 1 ms 1228 KB Output is correct
10 Correct 1 ms 1228 KB Output is correct
11 Correct 1 ms 1228 KB Output is correct
12 Correct 1 ms 1228 KB Output is correct
13 Incorrect 1 ms 1228 KB Output isn't correct
14 Incorrect 1 ms 1228 KB Output isn't correct
15 Incorrect 1 ms 1228 KB Output isn't correct
16 Incorrect 1 ms 1228 KB Output isn't correct
17 Incorrect 1 ms 1228 KB Output isn't correct
18 Incorrect 1 ms 1228 KB Output isn't correct
19 Incorrect 2 ms 1356 KB Output isn't correct
20 Incorrect 1 ms 1228 KB Output isn't correct
21 Correct 1 ms 1228 KB Output is correct
22 Incorrect 1 ms 1228 KB Output isn't correct
23 Incorrect 1 ms 1228 KB Output isn't correct
24 Incorrect 1 ms 1228 KB Output isn't correct
25 Incorrect 9 ms 1492 KB Output isn't correct
26 Incorrect 2 ms 1356 KB Output isn't correct
27 Correct 1 ms 1228 KB Output is correct
28 Incorrect 1 ms 1228 KB Output isn't correct
29 Incorrect 3 ms 1356 KB Output isn't correct
30 Incorrect 3 ms 1356 KB Output isn't correct
31 Incorrect 42 ms 1804 KB Output isn't correct
32 Incorrect 2 ms 1356 KB Output isn't correct
33 Correct 1 ms 1228 KB Output is correct
34 Incorrect 1 ms 1228 KB Output isn't correct
35 Incorrect 33 ms 2320 KB Output isn't correct
36 Incorrect 17 ms 2244 KB Output isn't correct
37 Runtime error 15 ms 3148 KB Execution killed with signal 11
38 Incorrect 151 ms 2580 KB Output isn't correct
39 Runtime error 4 ms 2636 KB Execution killed with signal 11
40 Runtime error 5 ms 2892 KB Execution killed with signal 11
41 Runtime error 7 ms 3008 KB Execution killed with signal 11
42 Runtime error 10 ms 3400 KB Execution killed with signal 11
43 Runtime error 15 ms 3388 KB Execution killed with signal 11
44 Runtime error 23 ms 3728 KB Execution killed with signal 11
45 Runtime error 11 ms 3696 KB Execution killed with signal 11
46 Runtime error 27 ms 4496 KB Execution killed with signal 11
47 Runtime error 27 ms 4164 KB Execution killed with signal 11
48 Runtime error 25 ms 4176 KB Execution killed with signal 11
49 Runtime error 29 ms 4676 KB Execution killed with signal 11
50 Runtime error 3 ms 2636 KB Execution killed with signal 11