Submission #567810

#	Time	Username	Problem	Language	Result	Execution time	Memory
567810		8e7	Bridges (APIO19_bridges)	C++17	13 / 100	3069 ms	11164 KiB

bridges

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T,class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 100005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
const int inf = 1<<30;
const int bs = 200;

vector<pii> adj[maxn];


int wei[maxn];
pii ed[maxn];

bool vis[maxn];
void getans(int n, int wi, int &ans) {
	ans++;
	vis[n] = 1;
	for (auto [v, w]:adj[n]) {
		if (!vis[v] && wei[w] >= wi) {
			getans(v, wi, ans);
		}
	}
}
int main() {
	io
	int n, m;
	cin >> n >> m;
	for (int i = 0;i < m;i++) {
		int u, v, w;
		cin >> u >> v >> w;
		ed[i] = {u, v};
		adj[u].push_back({v, i});
		adj[v].push_back({u, i});
		wei[i] = w;
	}
	
	int q;
	cin >> q;
	while (q--) {
		int type; cin >> type;
		if (type == 1) {
			int bi, ri;
			cin >> bi >> ri;
			bi--;
			wei[bi] = ri;
		} else {
			int s, w;
			cin >> s >> w;
			int ans = 0;
			for (int i = 1;i <= n;i++) vis[i] = 0;
			getans(s, w, ans);
			cout << ans << "\n";
		}
	}
}
/*
7 6
1 2 4
1 3 5
2 4 2
2 5 1
3 6 7
3 7 3
5
2 3 3
1 4 3
2 3 5
2 2 2
2 1 6
*/

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