Submission #934336

#	Time	Username	Problem	Language	Result	Execution time	Memory
934336		Rifal	Bridges (APIO19_bridges)	C++14	0 / 100	112 ms	860 KiB

bridges

#include <bits/stdc++.h>
#include <fstream>
#define endl '\n'
#define mod 1000000007
#define INF 1000000000
#define INF2 2000000000000000000
//#define ll long long
///#define cin fin
///#define cout fout
using namespace std;
double const EPS = 1e-14;
///ofstream fout("herding.out");
///ifstream fin("herding.in");
const int N = 1e3 + 2;
set<pair<int,int>> v[N];
pair<pair<int,int>,int> pa[N];
bool vis[N];
void sol(int s, int lim) {
    vis[s] = 1;
    for(auto i : v[s]) {
        if(vis[i.first] == 0 && i.second>= lim) {
        
            sol(i.first,lim);
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
    int n, m; cin >> n >> m;
    for(int i = 0; i < m; i++) {
        int a, b, c; cin >> a >> b >> c;
        pa[i] = {{a,b},c};
        v[a].insert({b,c});
        v[b].insert({a,c});
    }
    int q; cin >> q;
    while(q--) {
        int t, a, b; cin >> t >> a >> b;
        for(int i = 1; i <= n; i++) vis[i] = 0;
        if(t == 2) {
            sol(a,b);
            int ans = 0;
        for(int i = 1; i <= n; i++) {
            if(vis[i] == 1) {
                ans++;
               // cout << i << 'd' << endl;
            }
        }
        cout << ans << endl;
        }
        else {
            pair<pair<int,int>,int> cur = pa[a-1];
            v[cur.first.first].erase({cur.first.second,cur.second});
            v[cur.first.second].erase({cur.first.first,cur.second});
            v[cur.first.first].insert({cur.first.second,b});
            v[cur.first.second].insert({cur.first.first,b});
            pa[a-1].second = b;
    
        }
        
    }
    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