test/yosupo-Unionfind.test.cpp

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• Last update: 2021-04-08 19:35:44+09:00
• Problem: https://judge.yosupo.jp/problem/unionfind

Depends on

• Union-Find (data-structure/union-find.cpp)

Code

#define PROBLEM "https://judge.yosupo.jp/problem/unionfind"

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

#include "../data-structure/union-find.cpp"

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int n, q;
    cin >> n >> q;
    UnionFind uf(n);

    for(int i = 0; i < q; i++) {
        int t, u, v;
        cin >> t >> u >> v;
        if(t)
            cout << uf.same(u, v) << "\n";
        else
            uf.unite(u, v);
    }

    return 0;
}

#line 1 "test/yosupo-Unionfind.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/unionfind"

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

#line 3 "data-structure/union-find.cpp"
using namespace std;

struct UnionFind {
    vector<int> data;

    UnionFind() = default;

    explicit UnionFind(size_t sz) : data(sz, -1) {}

    bool unite(int x, int y) {
        x = find(x);
        y = find(y);
        if(x == y) return false;
        if(data[x] > data[y]) swap(x, y);
        data[x] += data[y];
        data[y] = x;
        return true;
    }

    int find(int x) { return data[x] < 0 ? x : data[x] = find(data[x]); }

    int size(int x) { return -data[x]; }

    bool same(int x, int y) { return find(x) == find(y); }
};
/*
 * @brief Union-Find
 * @docs docs/union-find.md
 */
#line 7 "test/yosupo-Unionfind.test.cpp"

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int n, q;
    cin >> n >> q;
    UnionFind uf(n);

    for(int i = 0; i < q; i++) {
        int t, u, v;
        cin >> t >> u >> v;
        if(t)
            cout << uf.same(u, v) << "\n";
        else
            uf.unite(u, v);
    }

    return 0;
}

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