Submission #537886

#	Time	Username	Problem	Language	Result	Execution time	Memory
537886		davi_bart	Kutije (COCI21_kutije)	C++14	70 / 70	151 ms	9404 KiB

Main

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define fi first
#define se second
#define ld long double
#define pb push_back
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int N, M, Q;
vector<int> v[1010];
struct dsu {
    int par[1010];
    void init() {
        iota(par, par + 1005, 0);
    }
    int p(int pos) {
        return par[pos] = (pos == par[pos] ? pos : p(par[pos]));
    }
    void unite(int a, int b) {
        a = p(a);
        b = p(b);
        if (a == b) return;
        par[a] = b;
    }
};
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> N >> M >> Q;
    dsu d;
    d.init();
    for (int i = 0; i < M; i++) {
        for (int j = 0; j < N; j++) {
            int x;
            cin >> x;
            x--;
            d.unite(x, j);
        }
    }
    for (int i = 0; i < Q; i++) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        if (d.p(a) == d.p(b))
            cout << "DA\n";
        else
            cout << "NE\n";
    }
}

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