Submission #1031774

#	Time	Username	Problem	Language	Result	Execution time	Memory
1031774		Gangsta	Bridges (APIO19_bridges)	C++14	0 / 100	516 ms	9240 KiB

bridges

#include "bits/stdc++.h"
#define ll long long int
#define pb push_back
#define pii pair<int,int>
#define ff first
#define ss second
#define sz size()

const int N = 5e4 + 1;

using namespace std;

int n, m, x[N], y[N], w[N], q, vis[N], ans;

vector <pii> v[N];

void dfs(int nd, int wgh){
	if(vis[nd]) return;
	ans++;
	vis[nd] = 1;
	for(auto i: v[nd]){
		if(wgh <= i.ss) dfs(i.ff,wgh);
	}
}

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    cin >> n >> m;
    for(int i = 1; i <= m; i++){
    	cin >> x[i] >> y[i] >> w[i];
    	v[x[i]].pb({y[i],w[i]});
    	v[y[i]].pb({x[i],w[i]});
    }
    cin >> q;
    while(q--){
    	int t, a, b;
    	cin >> t >> a >> b;
    	if(t == 1){
    		for(int i = 0; i < v[x[a]].sz; i++){
    			if(v[x[a]][i].ff == y[a] and v[x[a]][i].ss == w[a]){
    				v[x[a]][i].ss = b;
    				break;
    			}
    		}
    	}
    	else{
    		ans = 0;
    		for(int i = 1; i <= n; i++) vis[i] = 0;
    		dfs(a,b);
    		cout << ans << '\n';
    	}
    }
}

Compilation message (stderr)

bridges.cpp: In function 'int main()':
bridges.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |       for(int i = 0; i < v[x[a]].sz; i++){
      |                        ^

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