oj.uz

Submission #341226

# Submission time Handle Problem Language Result Execution time Memory
341226 2020-12-29T09:08:15 Z juggernaut Marriage questions (IZhO14_marriage) C++14
56 / 100
 1500 ms 3948 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);
    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: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
56.0 / 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 Correct 2 ms 2668 KB Output is correct
11 Correct 2 ms 2668 KB Output is correct
12 Correct 2 ms 2668 KB Output is correct
13 Correct 2 ms 2668 KB Output is correct
14 Correct 2 ms 2668 KB Output is correct
15 Correct 3 ms 2668 KB Output is correct
16 Correct 3 ms 2668 KB Output is correct
17 Correct 3 ms 2668 KB Output is correct
18 Correct 2 ms 2668 KB Output is correct
19 Correct 16 ms 2668 KB Output is correct
20 Correct 10 ms 2668 KB Output is correct
21 Correct 4 ms 2668 KB Output is correct
22 Correct 7 ms 2668 KB Output is correct
23 Correct 12 ms 2668 KB Output is correct
24 Correct 9 ms 2668 KB Output is correct
25 Execution timed out 1585 ms 2796 KB Time limit exceeded
26 Correct 939 ms 2796 KB Output is correct
27 Correct 72 ms 2668 KB Output is correct
28 Correct 404 ms 2736 KB Output is correct
29 Execution timed out 1588 ms 2668 KB Time limit exceeded
30 Execution timed out 1539 ms 2788 KB Time limit exceeded
31 Execution timed out 1562 ms 3052 KB Time limit exceeded
32 Execution timed out 1536 ms 2668 KB Time limit exceeded
33 Correct 581 ms 2896 KB Output is correct
34 Execution timed out 1596 ms 2668 KB Time limit exceeded
35 Execution timed out 1579 ms 3180 KB Time limit exceeded
36 Execution timed out 1579 ms 3180 KB Time limit exceeded
37 Execution timed out 1577 ms 3180 KB Time limit exceeded
38 Execution timed out 1579 ms 3436 KB Time limit exceeded
39 Execution timed out 1548 ms 2924 KB Time limit exceeded
40 Execution timed out 1535 ms 2924 KB Time limit exceeded
41 Execution timed out 1557 ms 3052 KB Time limit exceeded
42 Execution timed out 1594 ms 3328 KB Time limit exceeded
43 Execution timed out 1566 ms 3180 KB Time limit exceeded
44 Execution timed out 1559 ms 3312 KB Time limit exceeded
45 Execution timed out 1594 ms 3436 KB Time limit exceeded
46 Execution timed out 1585 ms 3820 KB Time limit exceeded
47 Execution timed out 1590 ms 3948 KB Time limit exceeded
48 Execution timed out 1597 ms 3692 KB Time limit exceeded
49 Execution timed out 1580 ms 3948 KB Time limit exceeded
50 Execution timed out 1587 ms 2924 KB Time limit exceeded