oj.uz

Submission #341229

# Submission time Handle Problem Language Result Execution time Memory
341229 2020-12-29T09:11:22 Z juggernaut Marriage questions (IZhO14_marriage) C++14
52 / 100
 1500 ms 3956 KB 
#include<bits/stdc++.h>
using namespace std;
vector<int>g[100005];
int mt[100005];
int n,m,q;
bool used[100001];
int X,Y;
bool kuhn(int v){
    if(used[v]||v<X||v>Y)return false;
    used[v]=true;
    for(int to:g[v]){
        if(mt[to]==0||kuhn(mt[to])){
            mt[to]=v;
            return true;
        }
    }
    return false;
}
bool check(int l,int r){
    X=l,Y=r;
    for(int i=1;i<=n;i++)mt[i]=0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++)used[j]=false;
        kuhn(i);
    }
    int c=0;
    for(int i=1;i<=n;i++)if(mt[i])c++;
    return c==m;
}
int main(){
    scanf("%d%d%d",&n,&m,&q);
    if(n<m||q<m)return puts("0");
    while(q--){
        int x,y;
        scanf("%d%d",&x,&y);
        g[x].push_back(y);
    }
    int ans=0;
    for(int GL=1;GL<=n;GL++){
        if(!check(GL,n))continue;
        int l=GL,r=n+1;
        while(l<r){
            int mid=(l+r)>>1;
            if(check(GL,mid))r=mid;
            else l=mid+1;
        }
        ans+=n-l+1;
    }
    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,&q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
marriage.cpp:35:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
52.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2668 KB Output is correct
2 Correct 2 ms 2668 KB Output is correct
3 Correct 2 ms 2668 KB Output is correct
4 Correct 2 ms 2668 KB Output is correct
5 Correct 2 ms 2668 KB Output is correct
6 Correct 2 ms 2668 KB Output is correct
7 Correct 2 ms 2668 KB Output is correct
8 Correct 2 ms 2668 KB Output is correct
9 Correct 2 ms 2668 KB Output is correct
10 Runtime error 2 ms 2668 KB Execution failed because the return code was nonzero
11 Correct 2 ms 2668 KB Output is correct
12 Runtime error 2 ms 2668 KB Execution failed because the return code was nonzero
13 Correct 2 ms 2668 KB Output is correct
14 Correct 2 ms 2668 KB Output is correct
15 Correct 2 ms 2668 KB Output is correct
16 Correct 2 ms 2668 KB Output is correct
17 Correct 2 ms 2668 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 17 ms 2668 KB Output is correct
20 Correct 13 ms 2668 KB Output is correct
21 Correct 3 ms 2668 KB Output is correct
22 Correct 8 ms 2668 KB Output is correct
23 Correct 14 ms 2668 KB Output is correct
24 Correct 9 ms 2668 KB Output is correct
25 Execution timed out 1587 ms 2796 KB Time limit exceeded
26 Correct 980 ms 2796 KB Output is correct
27 Correct 70 ms 2668 KB Output is correct
28 Correct 406 ms 2668 KB Output is correct
29 Execution timed out 1585 ms 2668 KB Time limit exceeded
30 Execution timed out 1543 ms 2788 KB Time limit exceeded
31 Execution timed out 1588 ms 3052 KB Time limit exceeded
32 Execution timed out 1561 ms 2668 KB Time limit exceeded
33 Correct 506 ms 2796 KB Output is correct
34 Execution timed out 1587 ms 2668 KB Time limit exceeded
35 Execution timed out 1594 ms 3180 KB Time limit exceeded
36 Execution timed out 1582 ms 3180 KB Time limit exceeded
37 Execution timed out 1587 ms 3180 KB Time limit exceeded
38 Execution timed out 1584 ms 3436 KB Time limit exceeded
39 Execution timed out 1591 ms 2924 KB Time limit exceeded
40 Execution timed out 1574 ms 3072 KB Time limit exceeded
41 Execution timed out 1591 ms 3052 KB Time limit exceeded
42 Execution timed out 1580 ms 3180 KB Time limit exceeded
43 Execution timed out 1579 ms 3180 KB Time limit exceeded
44 Execution timed out 1585 ms 3564 KB Time limit exceeded
45 Execution timed out 1589 ms 3436 KB Time limit exceeded
46 Execution timed out 1593 ms 3820 KB Time limit exceeded
47 Execution timed out 1595 ms 3824 KB Time limit exceeded
48 Execution timed out 1589 ms 3956 KB Time limit exceeded
49 Execution timed out 1579 ms 3948 KB Time limit exceeded
50 Execution timed out 1578 ms 3052 KB Time limit exceeded