Peli

#include <bits/stdc++.h>
using namespace std;
#define rall(x) x.rbegin(),x.rend()
#define all(x) x.begin(),x.end()
using ll = long long;

const int N = 51;
vector<int> adj[N];
bool vis[N][N][101];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n, m, q;
    cin >> n >> m >> q;

    while (m--) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }

    for (int i = 1; i <= n; i++) {

        queue<pair<int, int>> bfs;
        bfs.push({0, i});

        while (!bfs.empty()) {
            auto [d, s] = bfs.front();
            bfs.pop();
            if (vis[i][s][d]) continue;
            vis[i][s][d] = true;
            if (d == 100) continue;
            for (auto u : adj[s]) bfs.push({d+1, u});
        }

    }

    while (q--) {
        int a, b, x;
        cin >> a >> b >> x;
        cout << (vis[a][b][x] ? "YES\n" : "NO\n");
    }
    
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 2

Verdict: RUNTIME ERROR

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: RUNTIME ERROR

Test 7

Group: 2

Verdict: RUNTIME ERROR

Test 8

Group: 1, 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 10

Group: 2

Verdict: RUNTIME ERROR