Submission #1069676

#	Time	Username	Problem	Language	Result	Execution time	Memory
1069676		vjudge1	Bridges (APIO19_bridges)	C++17	13 / 100	29 ms	9080 KiB

bridges

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

#define ll long long
#define pll pair<long long, long long>
#define pb push_back
#define F first
#define S second  
#define all(x) (x).begin(), (x).end()

const ll N = 3e5 + 100;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const ll block = 350;
ll n,m,q;
ll c[N];
bool vs[N];
vector<pll>adj[N];
struct cmp{
	bool operator()(const pll &a, const pll &b){
		return a.S > b.S;
	}
};
void sub1(){
	for(int i = 1; i <= m;i++){
		ll u,v,w; cin >> u >> v >> w;
		adj[u].pb({v, i}), adj[v].pb({u, i});
		c[i] = w;
	}
	cin >> q;
	while(q--){
		ll typ; cin >> typ;
		if(typ == 1){
			ll x,y; cin >> x >> y;
			c[x] = y;
		}
		else{
			ll s,w; cin >> s >> w;
			for(int i = 1; i <= n;i++) vs[i] = 0;
			vs[s] = 1;
			queue<ll>q;
			q.push(s);
			while(q.size()){
				ll u = q.front();q.pop();
				for(auto v : adj[u]){
					if(vs[v.F] || w > c[v.S]) continue;
					vs[v.F] = 1;
					q.push(v.F);
				}
			}
			ll res = 0;
			for(int i = 1; i <= n;i++) if(vs[i]) res++;
			cout << res << "\n";
		}
	}
}
void to_thic_cau(){ 
	cin >> n >> m;
	if(max(n, m) <= 1000) sub1();
}    


signed main()   
{  
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	ll tc = 1;
	//cin >> tc;
	while(tc--) to_thic_cau();
}

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