Submission #820934

#	Time	Username	Problem	Language	Result	Execution time	Memory
820934		boris_mihov	Marshmallow Molecules (CCO19_day2problem2)	C++17	5 / 25	4053 ms	25720 KiB

Main

#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>

typedef long long llong;
const int MAXN = 5000 + 10;
const llong INF = 1e18;
const int INTINF = 1e9;

int n, m;
bool c[MAXN][MAXN];

void solve()
{
    for (int i = 1 ; i <= n ; ++i)
    {
        for (int j = i + 1 ; j <= n ; ++j)
        {
            if (!c[i][j])
            {
                continue;
            }

            for (int k = i + 1 ; k <= n ; ++k)
            {
                if (!c[i][k] || j == k)
                {
                    continue;
                }

                c[j][k] = true;
            }
        }
    }

    int cnt = 0;
    for (int i = 1 ; i <= n ; ++i)
    {
        for (int j = i + 1 ; j <= n ; ++j)
        {
            cnt += c[i][j];
        }
    }

    std::cout << cnt << '\n';
}

void input()
{
    std::cin >> n >> m;
    for (int i = 1 ; i <= m ; ++i)
    {
        int u, v;
        std::cin >> u >> v;
        c[u][v] = true;
        c[v][u] = true;
    }
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}

int main()
{
    fastIOI();
    input();
    solve();

    return 0;
}

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