Submission #1167907

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167907		kungfulon	Drivers (BOI24_drivers)	C++20	0 / 100	1 ms	324 KiB

Main

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

int n,m,u;

struct edge{
    int u, v, w;
    edge(int u, int v, int w): u(u), v(v), w(w) {}

    bool operator<(const edge& other) const {
        return w < other.w;
    }
};

int dsu[200001];

int find(int x){
    return !dsu[x] ? x : dsu[x] = find(dsu[x]);
}

int main(){
    if(fopen("inp.txt", "r")){
        freopen("inp.txt", "r", stdin);
    }
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> n >> m >> u;

    vector<edge> edges;
    for(int i = 0; i < m; i++){
        int u, v, w;
        cin >> u >> v >> w;
        edges.push_back(edge(u, v, w));
    }

    sort(edges.begin(), edges.end());

    int id = 0;
    for (int i = 0;i < u;i++) {
        int a, b, t;
        cin >> a >> b >> t;
        edge e(a, b, t);
        while(id < m && edges[id].w <= t){
            if (find(edges[id].u) != find(edges[id].v)){
                dsu[find(edges[id].u)] = find(edges[id].v);
            }
            id++;
        }
        if (find(a) == find(b)) {
            cout << "TAIP\n";
        } else {
            cout << "NE\n";
        }
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen("inp.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 23
• Subtask 5: 0 / 45