Submission #978980

#	Time	Username	Problem	Language	Result	Execution time	Memory
978980		Halym2007	Bridges (APIO19_bridges)	C++17	13 / 100	3052 ms	10116 KiB

bridges

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define pb push_back
#define pii pair <int, int>
#define sz size()
const int N = 5e4 + 5;

pii val[N];
int l[N], r[N], w[N], vis[N];
vector <pii> v[N];
void dfs (int x, int y) {
	vis[x] = 1;
	for (pii i : v[x]) {
		if (vis[i.ff]) continue;
		if (y <= i.ss) dfs (i.ff, y);
	}
}

int main () {
//	freopen ("input.txt", "r", stdin);
	int n, m, q;
	cin >> n >> m;
	for (int i = 1; i <= m; ++i) {
		cin >> l[i] >> r[i] >> w[i];
		val[i] = {(int)v[l[i]].sz, (int)v[r[i]].sz};
		v[l[i]].pb({r[i], w[i]});
		v[r[i]].pb({l[i], w[i]});
	}
	cin >> q;
	while ( q-- ) {
		int query, x, y;
		cin >> query >> x >> y;
//		cout << "--> " << query << " " << x << " " << y << "\n";
		if (query == 1) {
			pii pos = val[x];
			v[l[x]][pos.ff].ss = y;
			v[r[x]][pos.ss].ss = y;
		}
		else {
			dfs (x, y);
			int jog = 0;
			for (int i = 1; i <= n; ++i) {
				if (vis[i]) jog++;
				vis[i] = 0;
			}
			cout << jog << "\n";
		}
	}
}

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