Submission #745448

#	Time	Username	Problem	Language	Result	Execution time	Memory
745448		Alexandruabcde	Marshmallow Molecules (CCO19_day2problem2)	C++14	5 / 25	4106 ms	826896 KiB

Main

#include <bits/stdc++.h>

using namespace std;

typedef pair <int, int> PII;
constexpr int NMAX = 1e5 + 5;

int N, M;
vector <int> G[NMAX];

map <PII, int> mp;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> N >> M;

    for (int i = 1; i <= M; ++ i ) {
        int x, y;
        cin >> x >> y;

        if (x > y) swap(x, y);
        G[x].push_back(y);

        mp[{x, y}] = true;
    }

    for (int i = 1; i <= N; ++ i ) {
        sort(G[i].begin(), G[i].end());

        if (G[i].empty()) continue;

        int x = G[i][0];
        for (int j = 1; j < G[i].size(); ++ j ) {
            int y = G[i][j];

            if (!mp[{x, y}]) {
                G[x].push_back(y);
                mp[{x, y}] = true;
            }
        }
    }

    cout << mp.size() << '\n';

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:36:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for (int j = 1; j < G[i].size(); ++ j ) {
      |                         ~~^~~~~~~~~~~~~

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