oj.uz

Submission #341228

# Submission time Handle Problem Language Result Execution time Memory
341228 2020-12-29T09:10:42 Z juggernaut Marriage questions (IZhO14_marriage) C++14
52 / 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);
    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++){
        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 11 ms 2668 KB Output is correct
20 Correct 10 ms 2668 KB Output is correct
21 Correct 6 ms 2668 KB Output is correct
22 Correct 8 ms 2668 KB Output is correct
23 Correct 12 ms 2668 KB Output is correct
24 Correct 10 ms 2668 KB Output is correct
25 Correct 884 ms 2924 KB Output is correct
26 Correct 752 ms 2828 KB Output is correct
27 Correct 516 ms 2668 KB Output is correct
28 Correct 579 ms 2924 KB Output is correct
29 Execution timed out 1594 ms 2668 KB Time limit exceeded
30 Execution timed out 1587 ms 2812 KB Time limit exceeded
31 Execution timed out 1575 ms 3052 KB Time limit exceeded
32 Execution timed out 1586 ms 2668 KB Time limit exceeded
33 Execution timed out 1585 ms 2668 KB Time limit exceeded
34 Execution timed out 1589 ms 2668 KB Time limit exceeded
35 Execution timed out 1581 ms 3180 KB Time limit exceeded
36 Execution timed out 1591 ms 3180 KB Time limit exceeded
37 Execution timed out 1550 ms 3180 KB Time limit exceeded
38 Execution timed out 1558 ms 3436 KB Time limit exceeded
39 Execution timed out 1585 ms 3052 KB Time limit exceeded
40 Execution timed out 1589 ms 2924 KB Time limit exceeded
41 Execution timed out 1587 ms 3052 KB Time limit exceeded
42 Execution timed out 1579 ms 3436 KB Time limit exceeded
43 Execution timed out 1593 ms 3308 KB Time limit exceeded
44 Execution timed out 1594 ms 3548 KB Time limit exceeded
45 Execution timed out 1554 ms 3436 KB Time limit exceeded
46 Execution timed out 1572 ms 3820 KB Time limit exceeded
47 Execution timed out 1592 ms 3820 KB Time limit exceeded
48 Execution timed out 1546 ms 3880 KB Time limit exceeded
49 Execution timed out 1574 ms 3948 KB Time limit exceeded
50 Execution timed out 1579 ms 3224 KB Time limit exceeded