test/yosupo/unionfind.test.cpp

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Last update: 2020-04-01 18:40:05+09:00
Problem: https://judge.yosupo.jp/problem/unionfind

Depends on

src/DataStructure/UnionFind.hpp

Code

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

#include <bits/stdc++.h>  // clang-format off
using Int = long long;
#define REP_(i, a_, b_, a, b, ...) for (Int i = (a), lim##i = (b); i < lim##i; i++)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
struct SetupIO { SetupIO() { std::cin.tie(nullptr), std::ios::sync_with_stdio(false), std::cout << std::fixed << std::setprecision(13); } } setup_io;
#ifndef _MY_DEBUG
#define dump(...)
#endif  // clang-format on

/**
 *    author:  knshnb
 *    created: Sun Mar 29 05:04:23 JST 2020
 **/

#define CALL_FROM_TEST
#include "../../src/DataStructure/UnionFind.hpp"
#undef CALL_FROM_TEST

signed main() {
    Int n, Q;
    std::cin >> n >> Q;
    UnionFind uf(n);
    REP(q, Q) {
        Int t, u, v;
        std::cin >> t >> u >> v;
        if (t == 0) {
            uf.unite(u, v);
        } else {
            std::cout << uf.is_same(u, v) << "\n";
        }
    }
}

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

#include <bits/stdc++.h>  // clang-format off
using Int = long long;
#define REP_(i, a_, b_, a, b, ...) for (Int i = (a), lim##i = (b); i < lim##i; i++)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
struct SetupIO { SetupIO() { std::cin.tie(nullptr), std::ios::sync_with_stdio(false), std::cout << std::fixed << std::setprecision(13); } } setup_io;
#ifndef _MY_DEBUG
#define dump(...)
#endif  // clang-format on

/**
 *    author:  knshnb
 *    created: Sun Mar 29 05:04:23 JST 2020
 **/

#define CALL_FROM_TEST
#line 1 "src/DataStructure/UnionFind.hpp"
struct UnionFind {
    int cnt;                  // 集合の数
    std::vector<int> number;  // 0以上のとき親のindex, 負のときは集合サイズ
    UnionFind(int n) : cnt(n), number(n, -1) {}
    int root(int x) { return number[x] < 0 ? x : number[x] = root(number[x]); }
    void unite(int x, int y) {
        x = root(x), y = root(y);
        if (x == y) return;
        if (number[y] < number[x]) std::swap(x, y);
        // yをxにマージ
        number[x] += number[y];
        number[y] = x;
        cnt--;
    }
    bool is_same(int x, int y) { return root(x) == root(y); }
    int size(int x) { return -number[root(x)]; }
};
#line 19 "test/yosupo/unionfind.test.cpp"
#undef CALL_FROM_TEST

signed main() {
    Int n, Q;
    std::cin >> n >> Q;
    UnionFind uf(n);
    REP(q, Q) {
        Int t, u, v;
        std::cin >> t >> u >> v;
        if (t == 0) {
            uf.unite(u, v);
        } else {
            std::cout << uf.is_same(u, v) << "\n";
        }
    }
}