#849804 (C++17) No.1610 She Loves Me, She Loves Me Not, ...

提出ソース

結果

問題	No.1610 She Loves Me, She Loves Me Not, ...
ユーザー	T101010101
提出日時	2023-03-17 15:10:56
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	4 ms / 2,000 ms
コード長	6,530 bytes
コンパイル時間	4,596 ms
コンパイル使用メモリ	295,540 KB
実行使用メモリ	6,948 KB
最終ジャッジ日時	2024-09-18 09:59:35
合計ジャッジ時間	6,069 ms
ジャッジサーバーID （参考情報）	judge4 / judge5

このコードへのチャレンジ
（要ログイン）

テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	2 ms 6,812 KB
testcase_01	AC	3 ms 6,944 KB
testcase_02	AC	2 ms 6,940 KB
testcase_03	AC	2 ms 6,940 KB
testcase_04	AC	2 ms 6,940 KB
testcase_05	AC	4 ms 6,940 KB
testcase_06	AC	4 ms 6,940 KB
testcase_07	AC	3 ms 6,940 KB
testcase_08	AC	4 ms 6,944 KB
testcase_09	AC	3 ms 6,944 KB
testcase_10	AC	4 ms 6,944 KB
testcase_11	AC	4 ms 6,940 KB
testcase_12	AC	4 ms 6,944 KB
testcase_13	AC	4 ms 6,944 KB
testcase_14	AC	2 ms 6,948 KB
testcase_15	AC	2 ms 6,944 KB
testcase_16	AC	2 ms 6,940 KB
testcase_17	AC	2 ms 6,944 KB
testcase_18	AC	2 ms 6,940 KB
testcase_19	AC	2 ms 6,940 KB
testcase_20	AC	2 ms 6,944 KB
testcase_21	AC	2 ms 6,944 KB
testcase_22	AC	2 ms 6,944 KB
testcase_23	AC	2 ms 6,940 KB
testcase_24	AC	2 ms 6,940 KB
testcase_25	AC	2 ms 6,940 KB
testcase_26	AC	2 ms 6,940 KB
testcase_27	AC	2 ms 6,944 KB
testcase_28	AC	2 ms 6,940 KB
testcase_29	AC	2 ms 6,944 KB
testcase_30	AC	2 ms 6,944 KB
testcase_31	AC	2 ms 6,944 KB
testcase_32	AC	2 ms 6,940 KB
testcase_33	AC	2 ms 6,944 KB
testcase_34	AC	2 ms 6,940 KB
testcase_35	AC	2 ms 6,940 KB

権限があれば一括ダウンロードができます

ソースコード

raw source code

#pragma region Macros

#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;
// using namespace __gnu_cxx;

// #include <boost/multiprecision/cpp_int.hpp>
// namespace mp = boost::multiprecision;
// using Bint = mp::cpp_int;

#define TO_STRING(var) # var
#define pb emplace_back
#define ture true
#define int ll
#define endl '\n'

using ll = long long;
using ld = long double;
const ld PI = acos(-1);
const ld EPS = 1e-10;
const int INF = 1 << 30;
const ll INFL = 1LL << 61;
// const int MOD = 998244353;
const int MOD = 1000000007;

__attribute__((constructor))
void constructor() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    // ifstream in("input.txt");
    // cin.rdbuf(in.rdbuf());
    cout << fixed << setprecision(15);
}

class UnionFind {
public:

	UnionFind() = default;

    UnionFind(int n) : par(n), 
	    sz(n, 1) { iota(par.begin(), par.end(), 0); }

	int root(int x) {
		if (par[x] == x) return x;
		return (par[x] = root(par[x]));
	}

	bool unite(int x, int y) {
		int rx = root(x);
		int ry = root(y);

        if (rx == ry) return false;
		if (sz[rx] < sz[ry]) swap(rx, ry);

		sz[rx] += sz[ry];
		par[ry] = rx;

        return true;
	}

	bool issame(int x, int y) {
		return (root(x) == root(y));
	}

	int size(int x) {
		return sz[root(x)];
	}

    int get_sum(int x) {
        return sum[root(x)];
    }

    vector<vector<int>> groups(int n) {
        vector<vector<int>> G(n);
        for (int x = 0; x < n; x++) {
            G[root(x)].push_back(x);
        }
		G.erase(
            remove_if(G.begin(), G.end(),
                [&](const vector<int>& v) { return v.empty(); }),
                    G.end());
        return G;
    }

private:
	vector<int> par;
	vector<int> sz;
    vector<int> sum;
};

template<int mod> class modint{
public:
    int val = 0;
    modint(int x = 0) { while (x < 0) x += mod; val = x % mod; }
    modint(const modint &r) { val = r.val; }

    modint operator -() { return modint(-val); }
    modint operator +(const modint &r) { return modint(*this) += r; }
    modint operator +(const int &q) { modint r(q); return modint(*this) += r; }
    modint operator -(const modint &r) { return modint(*this) -= r; }
    modint operator -(const int &q) { modint r(q); return modint(*this) -= r; }
    modint operator *(const modint &r) { return modint(*this) *= r; }
    modint operator *(const int &q) { modint r(q); return modint(*this) *= r; }
    modint operator /(const modint &r) { return modint(*this) /= r; }
    modint operator /(const int &q) { modint r(q); return modint(*this) /= r; }
    modint& operator ++() { val = (val + 1) % mod; return *this; }
    modint& operator --() { val = (val - 1 + mod) % mod; return *this; }

    modint &operator +=(const modint &r) {
        val += r.val; if (val >= mod) val -= mod;
        return *this;
    }
    modint &operator +=(const int &q) {
        modint r(q); val += r.val; if (val >= mod) val -= mod;
        return *this;
    }
    modint &operator -=(const modint &r) {
        if (val < r.val) val += mod; val -= r.val;
        return *this;
    }
    modint &operator -=(const int &q) {
        modint r(q);  if (val < r.val) val += mod; val -= r.val;
        return *this;
    }
    modint &operator *=(const modint &r) {
        val = val * r.val % mod;
        return *this;
    }
    modint &operator *=(const int &q) {
        modint r(q); val = val * r.val % mod;
        return *this;
    }
    modint &operator /=(const modint &r) {
        int a = r.val, b = mod, u = 1, v = 0;
        while (b) {int t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v);}
        val = val * u % mod; if (val < 0) val += mod;
        return *this;
    }
    modint &operator /=(const int &q) {
        modint r(q); int a = r.val, b = mod, u = 1, v = 0;
        while (b) {int t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v);}
        val = val * u % mod; if (val < 0) val += mod;
        return *this;
    }

    bool operator ==(const modint& r) { return this -> val == r.val; }
    bool operator <(const modint& r) { return this -> val < r.val; }
    bool operator !=(const modint& r) { return this -> val != r.val; }
};

using mint = modint<MOD>;

istream &operator >>(istream &is, mint& x) {
    int t; is >> t;
    x = t;
    return (is);
}
ostream &operator <<(ostream &os, const mint& x) {
    return os << x.val;
}

mint modpow(const mint &a, int n) {
    if (n == 0) return 1;
    mint t = modpow(a, n / 2);
    t = t * t;
    if (n & 1) t = t * a;
    return t;
}

int modpow(int x, int n, int mod) {
    int ret = 1;
    while (n > 0) {
        if (n % 2 == 1) ret = ret * x % mod;
        x = x * x % mod;
        n /= 2;
    }
    return ret;
}

int POW(int x, int y) {
    if (y < 0 or x != 0 && x != 1 && y > 64) {cout << "Error" << endl;return 0;}
    if (y == 0) return 1;
    if (y % 2 == 0) return POW(x * x, y / 2);
    return x * POW(x, y - 1);
}
int ceil(int x, int y) { return (x > 0 ? (x + y - 1) / y : x / y); }

vector<mint> fac, finv, inv;
void COMinit(int N) {
    fac.resize(N + 1);
    finv.resize(N + 1);
    inv.resize(N + 1);
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i <= N; i++) {
        fac[i] = fac[i-1] * mint(i);
        inv[i] = -inv[MOD % i] * mint(MOD / i);
        finv[i] = finv[i - 1] * inv[i];
    }
}

mint COM(int N,int K){
    if(N < K)return 0;
    if(N < 0 || K < 0) return 0;
    return fac[N] * finv[K] * finv[N - K];
}

#pragma endregion

signed main() {
    int N, M;
    cin >> N >> M;

    vector<vector<int>> G(N);
    for (int i = 0; i < M; i++) {
        int u, v;
        cin >> u >> v;
        u--; v--;
        G[u].pb(v);
        G[v].pb(u);
    }

    vector<int> deg(N), used(N);
    queue<int> qu;
    int cnt = 0;
    for (int i = 0; i < N; i++) {
        deg[i] = G[i].size();
        if (deg[i] == 1) {
            qu.emplace(i);
            used[i] = true;
        }
    }

    while (qu.size()) {
        int v = qu.front();
        qu.pop();
        if (deg[v] == 1) cnt++;
        for (auto nv : G[v]) {
            if (deg[nv] == 0) continue;

            deg[v]--;
            deg[nv]--; // ここら辺はN=2のパスグラフがコーナーケース
            if (deg[nv] == 1) {
                qu.emplace(nv);
                used[nv] = true;
            }
        }
    }
    if (cnt % 2) cout << "Yes" << endl;
    else cout << "No" << endl;
}

yukicoder

結果

テストケース

ソースコード