#856798 (C++17) No.1147 土偶Ⅱ

• 問題: No.1147 土偶Ⅱ
• ユーザー: commy
• 提出日時: 2023-04-06 23:02:27
• 言語: C++17 (gcc 13.3.0 + boost 1.87.0)
• 結果: WA
• 実行時間: -
• コード長: 2,822 bytes
• コンパイル時間: 1,192 ms
• コンパイル使用メモリ: 91,836 KB
• 最終ジャッジ日時: 2025-02-11 23:30:29
• ジャッジサーバーID （参考情報）: judge2 / judge3

ファイルパターン	結果
sample	AC * 3
other	AC * 10 WA * 10

ソースコード

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#include <algorithm>
#include <iostream>
#include <numeric>
#include <string>
#include <tuple>
#include <utility>
#include <vector>
#include <limits>
#define rep(i, a, b) for (int i = int(a); i < int(b); i++)
using namespace std;
using ll = long long int;  // NOLINT
using P = pair<ll, ll>;
// clang-format off
#ifdef _DEBUG_
#define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; debug_print(__VA_ARGS__); } while(false)
template<typename T, typename... Ts> void debug_print(const T &t, const Ts &...ts) { cerr << t; ((cerr << ", " << ts), ...); cerr << endl; }
#else
#define dump(...) do{ } while(false)
#endif
template<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); }
template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); }
template<typename T> bool chmin(T &a, const T& b) { if (a > b) {a = b; return true; } return false; }
template<typename T> bool chmax(T &a, const T& b) { if (a < b) {a = b; return true; } return false; }
template<typename T, typename... Ts> void print(const T& t, const Ts&... ts) { cout << t; ((cout << ' ' << ts), ...); cout << '\n'; }
template<typename... Ts> void input(Ts&... ts) { (cin >> ... >> ts); }
template<typename T> istream &operator,(istream &in, T &t) { return in >> t; }
struct Inf { template<typename T> constexpr operator T() { return numeric_limits<T>::max() / 2; } };
// clang-format on
class UnionFind {
public:
    vector<int> par;
    int N;
    UnionFind(int n) {
        par.resize(n, -1);
        N = n;
    }
    int Find(int n) {
        return par[n] < 0 ? n : par[n] = Find(par[n]);
    }
    bool Union(int x, int y) {
        x = Find(x);
        y = Find(y);
        if (x == y) return false;
        if (-par[x] > -par[y]) swap(x, y);
        par[y] += par[x];
        par[x] = y;
        N--;
        return true;
    }
    bool Same(int x, int y) {
        return Find(x) == Find(y);
    }
    int size(int x) {
        return -par[Find(x)];
    }
    int size() {
        return N;
    }
};
#include <set>
int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    vector<set<int>> v(n);
    UnionFind uf(n);
    rep(i, 0, m) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        v[a].insert(b);
        v[b].insert(a);
        uf.Union(a, b);
    }
    auto check = [&](int a, int b) {
        if (!uf.Same(a, b)) return true;
        if (v[a].count(b)) return true;
        return false;
    };
    int ans = 0;
    rep(i, 0, n) {
        rep(j, i + 1, n) {
            if (!check(i, j)) continue;
            rep(k, j + 1, n) {
                if (!check(i, k) || !check(j, k)) continue;
                ans++;
            }
        }
    }
    print(ans);
    return 0;
}
 
 
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