Submission #1266433

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266433		canhnam357	Cijanobakterije (COCI21_cijanobakterije)	C++20	70 / 70	35 ms	7496 KiB

Main

#include <bits/stdc++.h>
using namespace std;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    vector<vector<int>> adj(n);
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        adj[--u].push_back(--v);
        adj[v].push_back(u);
    }
    int ans = 0;
    vector<int> vis(n), vis2(n), vis3(n), d(n);
    for (int i = 0; i < n; i++) {
        if (vis[i]) continue;
        int s;
        queue<int> q;
        q.push(i);
        vis2[i] = 1;
        while (!q.empty()) {
            int u = q.front();
            q.pop();
            s = u;
            for (int v : adj[u]) {
                if (!vis2[v]) {
                    vis2[v] = 1;
                    q.push(v);
                }
            }
        }
        vis[s] = 1;
        int x = 0;
        d[s] = 1;
        q.push(s);
        while (!q.empty()) {
            int u = q.front();
            x = max(x, d[u]);
            q.pop();
            for (int v : adj[u]) {
                if (!vis[v]) {
                    vis[v] = 1;
                    q.push(v);
                    d[v] = d[u] + 1;
                }
            }
        }
        ans += x;
    }
    cout << ans;
    return 0;
}   

• Subtask 1: 15 / 15
• Subtask 2: 6 / 6
• Subtask 3: 6 / 6
• Subtask 4: 15 / 15
• Subtask 5: 28 / 28