oj.uz

Submission #821376

# Submission time Handle Problem Language Result Execution time Memory
821376 2023-08-11T09:39:45 Z Denkata Marshmallow Molecules (CCO19_day2problem2) C++14
0 / 25
 819 ms 1048576 KB 
#include<bits/stdc++.h>
using namespace std;
const int maxn = 2e5+3;
int i,j,p,q,n,m,k;
long long ans;
set <int> s[maxn];
set <int> Merge(set <int> a,set <int> b)
{
    if(b.empty())
        return a;
    if(a.empty())
        return b;
    if(a.size()<b.size())
        swap(a,b);
    a.insert(b.begin(),b.end());
    return a;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>n>>m;
    for(i=1;i<=m;i++)
    {
        cin>>p>>q;
        s[p].insert(q);
    }
    for(i=1;i<=n;i++)
    {
        if(s[i].size()==0)continue;
        ans+=(long long)s[i].size();
        p = *s[i].begin();s[i].erase(p);
        if(s[p].size()==0 || s[i].size()==0)continue;
        s[p] = Merge(s[i],s[p]);
    }
    cout<<ans<<endl;
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 9684 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 9684 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 819 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 9684 KB Output isn't correct
2 Halted 0 ms 0 KB -