oj.uz

Submission #341254

# Submission time Handle Problem Language Result Execution time Memory
341254 2020-12-29T10:14:28 Z juggernaut Marriage questions (IZhO14_marriage) C++14
100 / 100
 826 ms 1132 KB 
#include<bits/stdc++.h>
using namespace std;
int n,m,qq,mt[30005],GL,GR,vis[2005],timer;
vector<int>g[2005];
queue<int>q;
bool kuhn(int v){
    if(vis[v]==timer)return false;
    vis[v]=timer;
    for(int to:g[v]){
        if(to<GL||to>GR)continue;
        if(!mt[to]||kuhn(mt[to])){
            mt[to]=v;
            return true;
        }
    }
    return false;
}
bool check(){
    while(!q.empty()){
        int v=q.front();
        q.pop();
        timer++;
        if(!kuhn(v)){
            q.push(v);
            return false;
        }
    }
    return true;
}
int main(){
    scanf("%d%d%d",&n,&m,&qq);
    while(qq--){
        int x,y;
        scanf("%d%d",&x,&y);
        g[y].push_back(x);
    }
  srand(time(NULL));
  for(int i=1;i<=m;i++)random_shuffle(g[i].begin(),g[i].end());
    for(int i=1;i<=m;i++)q.push(i);
    int ans=0;
    GR=1;
    for(GL=1;GL<=n;GL++){
        while(GR<=n&&!check())GR++;
        ans+=n-GR+1;
        if(mt[GL]){
            q.push(mt[GL]);
            mt[GL]=0;
        }
    }
    cout<<ans;
}

Compilation message

marriage.cpp: In function 'int main()':
marriage.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |     scanf("%d%d%d",&n,&m,&qq);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~
marriage.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 2 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 376 KB Output is correct
25 Correct 37 ms 492 KB Output is correct
26 Correct 6 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 3 ms 384 KB Output is correct
30 Correct 2 ms 364 KB Output is correct
31 Correct 280 ms 748 KB Output is correct
32 Correct 11 ms 512 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 3 ms 364 KB Output is correct
35 Correct 121 ms 1004 KB Output is correct
36 Correct 85 ms 1004 KB Output is correct
37 Correct 826 ms 1004 KB Output is correct
38 Correct 22 ms 876 KB Output is correct
39 Correct 89 ms 492 KB Output is correct
40 Correct 4 ms 492 KB Output is correct
41 Correct 7 ms 620 KB Output is correct
42 Correct 8 ms 620 KB Output is correct
43 Correct 13 ms 748 KB Output is correct
44 Correct 24 ms 1004 KB Output is correct
45 Correct 10 ms 748 KB Output is correct
46 Correct 48 ms 1132 KB Output is correct
47 Correct 26 ms 1004 KB Output is correct
48 Correct 25 ms 1004 KB Output is correct
49 Correct 93 ms 1132 KB Output is correct
50 Correct 273 ms 492 KB Output is correct