oj.uz

Submission #341233

# Submission time Handle Problem Language Result Execution time Memory
341233 2020-12-29T09:14:49 Z juggernaut Marriage questions (IZhO14_marriage) C++14
44 / 100
 33 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;
int ans=0;
clock_t start;
bool kuhn(int v){
    if(clock()-start>3000){
        cout<<ans;
        exit(0);
    }
    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(){
    start=clock();
    scanf("%d%d%d",&n,&m,&q);
    if(n<m||q<m)return puts("0"),0;
    while(q--){
        int x,y;
        scanf("%d%d",&x,&y);
        g[x].push_back(y);
    }
    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:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("%d%d%d",&n,&m,&q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
marriage.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
44.0 / 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 4 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 3 ms 2668 KB Output is correct
15 Correct 3 ms 2668 KB Output is correct
16 Correct 4 ms 2668 KB Output is correct
17 Correct 3 ms 2668 KB Output is correct
18 Correct 3 ms 2668 KB Output is correct
19 Incorrect 5 ms 2668 KB Output isn't correct
20 Incorrect 5 ms 2668 KB Output isn't correct
21 Correct 5 ms 2668 KB Output is correct
22 Incorrect 5 ms 2816 KB Output isn't correct
23 Incorrect 5 ms 2668 KB Output isn't correct
24 Incorrect 5 ms 2668 KB Output isn't correct
25 Incorrect 5 ms 2796 KB Output isn't correct
26 Incorrect 5 ms 2668 KB Output isn't correct
27 Correct 5 ms 2668 KB Output is correct
28 Incorrect 5 ms 2668 KB Output isn't correct
29 Incorrect 5 ms 2796 KB Output isn't correct
30 Incorrect 5 ms 2668 KB Output isn't correct
31 Incorrect 13 ms 2924 KB Output isn't correct
32 Incorrect 6 ms 2668 KB Output isn't correct
33 Correct 5 ms 2668 KB Output is correct
34 Incorrect 5 ms 2668 KB Output isn't correct
35 Incorrect 22 ms 3180 KB Output isn't correct
36 Incorrect 24 ms 3180 KB Output isn't correct
37 Incorrect 13 ms 3180 KB Output isn't correct
38 Incorrect 23 ms 3436 KB Output isn't correct
39 Incorrect 5 ms 2796 KB Output isn't correct
40 Correct 5 ms 2924 KB Output is correct
41 Incorrect 8 ms 3052 KB Output isn't correct
42 Incorrect 12 ms 3180 KB Output isn't correct
43 Incorrect 14 ms 3180 KB Output isn't correct
44 Incorrect 24 ms 3308 KB Output isn't correct
45 Incorrect 11 ms 3436 KB Output isn't correct
46 Incorrect 33 ms 3820 KB Output isn't correct
47 Incorrect 26 ms 3692 KB Output isn't correct
48 Incorrect 24 ms 3692 KB Output isn't correct
49 Incorrect 33 ms 3948 KB Output isn't correct
50 Incorrect 5 ms 2924 KB Output isn't correct