Submission #1180941

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180941		meicris	Marshmallow Molecules (CCO19_day2problem2)	C++17	5 / 25	4101 ms	214544 KiB

Main

#include <bits/stdc++.h>
#include <vector>
using namespace std;
const int MAX=100005;
set<int> grafo [MAX];
void revisar_vecinos(int nodo){
    vector<int> vecinos(grafo[nodo].begin(), grafo[nodo].end());
    for (int i = 0; i < vecinos.size(); ++i) {
        int u = vecinos[i];
        if(u<=nodo) continue;
        for (int j = i + 1; j < vecinos.size(); ++j) {
            int v = vecinos[j];
            if (v <= nodo) continue;
            grafo[u].insert(v);
            grafo[v].insert(u);
        }
    }
}
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    long long int n, q;
    cin >> n >> q;
    long long   int a, b;
    while (q--) {
        cin >> a >> b;
        grafo[b].insert(a);
        grafo[a].insert(b);
    }
    long long int total=0;
    for (int i = 1; i <= n; i++) {
        revisar_vecinos(i);
        total += grafo[i].size();
    }
    cout<<total/2;
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 10