oj.uz

Submission #443030

# Submission time Handle Problem Language Result Execution time Memory
443030 2021-07-09T13:46:11 Z leaked Marriage questions (IZhO14_marriage) C++14
92 / 100
 1500 ms 2828 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 u[N],tt,n,m;
int 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++]=z;
            return 1;
        }
    }
    for(auto &z : g[v]){
        if(z<=tr && kuhn(mt[z])){
            mt[z]=v;
            return 1;
        }
    }
    return 0;
}
int check(int l,int r){
    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(kuhn2(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);
    }
    fill(mt,mt+m,-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
92.0 / 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 972 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 1100 KB Output is correct
20 Correct 1 ms 972 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 1 ms 972 KB Output is correct
25 Correct 26 ms 1292 KB Output is correct
26 Correct 9 ms 1100 KB Output is correct
27 Correct 1 ms 972 KB Output is correct
28 Correct 2 ms 972 KB Output is correct
29 Correct 5 ms 1100 KB Output is correct
30 Correct 4 ms 1100 KB Output is correct
31 Correct 153 ms 1592 KB Output is correct
32 Correct 14 ms 1100 KB Output is correct
33 Correct 1 ms 1100 KB Output is correct
34 Correct 7 ms 1100 KB Output is correct
35 Execution timed out 1586 ms 2428 KB Time limit exceeded
36 Execution timed out 1579 ms 2236 KB Time limit exceeded
37 Correct 758 ms 1808 KB Output is correct
38 Correct 154 ms 2372 KB Output is correct
39 Correct 410 ms 1368 KB Output is correct
40 Correct 4 ms 1228 KB Output is correct
41 Correct 103 ms 1604 KB Output is correct
42 Correct 130 ms 1796 KB Output is correct
43 Correct 154 ms 1924 KB Output is correct
44 Correct 474 ms 2440 KB Output is correct
45 Correct 1123 ms 2132 KB Output is correct
46 Execution timed out 1595 ms 2560 KB Time limit exceeded
47 Correct 594 ms 2768 KB Output is correct
48 Correct 601 ms 2828 KB Output is correct
49 Execution timed out 1570 ms 2628 KB Time limit exceeded
50 Correct 1458 ms 1416 KB Output is correct