Submission #1364131

#	Time	Username	Problem	Language	Result	Execution time	Memory
1364131		kawhiet	Bridges (APIO19_bridges)	C++20	13 / 100	3095 ms	5060 KiB

bridges

#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 47
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    cin >> n >> m;
    vector<array<int, 3>> e;
    for (int i = 0; i < m; i++) {
        int u, v, w;
        cin >> u >> v >> w;
        u--; v--;
        e.push_back({u, v, w});
    }
    int q;
    cin >> q;
    while (q--) {
        int t;
        cin >> t;
        if (t == 1) {
            int b, r;
            cin >> b >> r;
            b--;
            e[b][2] = r;
        } else {
            int s, w;
            cin >> s >> w;
            s--;
            vector<vector<int>> g(n);
            for (auto [u, v, d] : e) {
                if (d >= w) {
                    g[u].push_back(v);
                    g[v].push_back(u);
                }
            }
            vector<bool> vis(n);
            int res = 1;
            vis[s] = true;
            queue<int> q;
            q.push(s);
            while (!q.empty()) {
                int u = q.front();
                q.pop();
                for (int v : g[u]) {
                    if (!vis[v]) {
                        res++;
                        vis[v] = true;
                        q.push(v);
                    }
                }
            }
            cout << res << '\n';
        }
    }
    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27