Submission #973077

#	Time	Username	Problem	Language	Result	Execution time	Memory
973077		Unforgettablepl	Bridges (APIO19_bridges)	C++17	13 / 100	51 ms	4956 KiB

bridges

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

#define int long long
#define f first
#define s second

bool visited[1001];
vector<int> adj[1001];
pair<pair<int,int>,int> edges[1001];
int ans;

void dfs(int x,int wt){
    if(visited[x])return;
    visited[x]=true;
    ans++;
    for(int&i:adj[x]){
        if(edges[i].s<wt)continue;
        dfs(edges[i].f.f,wt);
        dfs(edges[i].f.s,wt);
    }
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,m;
    cin >> n >> m;
    for(int i=1;i<=m;i++){
        int a,b,c;cin>>a>>b>>c;
        edges[i] = {{a,b},c};
        adj[a].emplace_back(i);
        adj[b].emplace_back(i);
    }
    int q;
    cin >> q;
    for(int i=1;i<=q;i++){
        int type,a,b;cin>>type>>a>>b;
        if(type==1){
            edges[a].s = b;
        } else {
            for(bool&x:visited)x=false;
            ans = 0;
            dfs(a,b);
            cout << ans << '\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