oj.uz

Submission #443034

# Submission time Handle Problem Language Result Execution time Memory
443034 2021-07-09T14:00:12 Z leaked Marriage questions (IZhO14_marriage) C++14
96 / 100
 1500 ms 3292 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+M];
int uk;
int mt[N+M];
int h[N+M],u[N+M],tt,n,m;
int tr;
bool kuhn(int v){
    if(u[v]==tt) return 0;
    u[v]=tt;
    for(auto &z : g[v]){
        if(h[z] && (mt[z]==-1 || kuhn(mt[z]))){
            mt[z]=v;mt[v]=z;
            return 1;
        }
    }
    return 0;
}
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int k;
    scanf("%d%d%d",&n,&m,&k);
    for(int i=0;i<k;i++){
        int v,u;
        scanf("%d%d",&v,&u);--v;--u;
        g[v].pb(u+n);
        g[u+n].pb(v);
    }
    fill(mt,mt+n+m,-1);
    for(int i=0;i<m;i++) h[i+n]=1;
    int r=-1;
    int c=0;
    ll ans=0;
    for(int l=0;l<n;l++){
        if(l){
            h[l-1]=0;
            if(mt[l-1]!=-1){
                tt++;
                mt[mt[l-1]]=-1;
                c--;c+=kuhn(mt[l-1]);
                mt[l-1]=-1;
            }
        }
        while(r<n && c!=m){
            r++;tt++;
            h[r]=1;c+=kuhn(r);
        }
        ans+=n-r;
    }
    printf("%lld",ans);
    return 0;
}

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

Compilation message

marriage.cpp: In function 'int main()':
marriage.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     scanf("%d%d%d",&n,&m,&k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
marriage.cpp:48:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         scanf("%d%d",&v,&u);--v;--u;
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
96.0 / 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 3 ms 1100 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 1 ms 1100 KB Output is correct
24 Correct 1 ms 1100 KB Output is correct
25 Correct 37 ms 1228 KB Output is correct
26 Correct 7 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 7 ms 1208 KB Output is correct
30 Correct 6 ms 1100 KB Output is correct
31 Correct 369 ms 1680 KB Output is correct
32 Correct 26 ms 1100 KB Output is correct
33 Correct 1 ms 1100 KB Output is correct
34 Correct 4 ms 1100 KB Output is correct
35 Correct 143 ms 2280 KB Output is correct
36 Correct 109 ms 2032 KB Output is correct
37 Correct 1018 ms 1832 KB Output is correct
38 Correct 227 ms 2392 KB Output is correct
39 Correct 52 ms 1336 KB Output is correct
40 Correct 6 ms 1484 KB Output is correct
41 Correct 90 ms 1616 KB Output is correct
42 Correct 157 ms 1760 KB Output is correct
43 Correct 193 ms 1928 KB Output is correct
44 Correct 516 ms 2416 KB Output is correct
45 Correct 18 ms 2268 KB Output is correct
46 Execution timed out 1581 ms 3148 KB Time limit exceeded
47 Correct 849 ms 2864 KB Output is correct
48 Correct 846 ms 2916 KB Output is correct
49 Execution timed out 1587 ms 3292 KB Time limit exceeded
50 Correct 53 ms 1732 KB Output is correct