Submission #1130695

#	Time	Username	Problem	Language	Result	Execution time	Memory
1130695		Ludissey	Bridges (APIO19_bridges)	C++20	0 / 100	3092 ms	7984 KiB

bridges

#include <bits/stdc++.h>
#define int long long
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
 
using namespace std;

vector<vector<pair<int,int>>> neigh;
vector<int> w;
vector<int> visited;


int dfs(int x, int p, int mn){
    int s=1;
    if(visited[x]) return 0;
    visited[x]=true;
    for (auto u : neigh[x])
    {
        if(u.first==p) continue;
        if(w[u.second]>=mn) s+=dfs(u.first,x,mn);
    }
    return s;
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n,m,q; cin >> n >> m;
    neigh.resize(n);
    w.resize(n);
    visited.resize(n);
    for (int i = 0; i < m; i++)
    {
        int u,v; cin >> u >> v >> w[i];
        neigh[u-1].push_back({v-1,i});
        neigh[v-1].push_back({u-1,i});
    }
    cin >> q;
    for (int i = 0; i < q; i++)
    {
        int t; cin >> t;
        if(t==1){
            int b,r; cin >> b >> r;
            w[b-1]=r;
        }else{
            int s,mw; cin >> s >> mw;
            cout << dfs(s-1,-1, mw) << "\n";
            for (int j = 0; j < n; j++)
            {
                visited[j]=false;
            }
            
        }
    }
    return 0;
}

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