Submission #851818

#	Time	Username	Problem	Language	Result	Execution time	Memory
851818		vjudge1	Kutije (COCI21_kutije)	C++17	70 / 70	136 ms	1984 KiB

Main

//author:
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

#define ONLINE_JUDGE

struct DSU {
    vector <int> par;
    DSU(int n) {
        par.resize(n);
        iota(par.begin(), par.end(), 0ll);
    }

    bool same(int a, int b) {
        return get(a) == get(b);
    }

    inline int get(int a) {
        return par[a] = (par[a] == a ? a : get(par[a]));
    }

    void unite(int u, int v) {
        par[get(u)] = get(v);
    }
};

void solve() {
    int n, m, q; 
    cin >> n >> m >> q;

    DSU dsu(n +1);
    for(int i = 1; i <= m; i++) {
        for(int j = 1; j <= n; j++) {
            int x; 
            cin >> x;
            dsu.unite(j, x);
        }
    }

    for(int i = 1; i <= q; i++) {
        int a, b;
        cin >> a >> b;

        cout << (dsu.same(a, b) ? "DA" : "NE") << "\n";
    }
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    while(t--)
        solve();

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 35 / 35