結果
問題 | No.2494 Sum within Components |
ユーザー |
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提出日時 | 2023-10-06 22:07:57 |
言語 | C++17(clang) (17.0.6 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 208 ms / 2,000 ms |
コード長 | 5,725 bytes |
コンパイル時間 | 2,312 ms |
コンパイル使用メモリ | 166,820 KB |
実行使用メモリ | 21,120 KB |
最終ジャッジ日時 | 2024-07-26 16:12:16 |
合計ジャッジ時間 | 4,932 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 17 |
ソースコード
#include <bits/stdc++.h>using namespace std;typedef long long int ll;typedef unsigned long long ull;typedef long double ld;int dx[8] = { 1, 0, -1, 0, 1, 1, -1, -1 }, dy[8] = { 0, 1, 0, -1, 1, -1, 1, -1 };const long long mod = 998244353;const ll inf = 1LL << 60;const int INF = 5e8;template <int MOD>struct ModInt {static const int Mod = MOD;unsigned x;ModInt(): x(0){}ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }int get() const { return (int)x; }ModInt& operator+=(ModInt that){if ((x += that.x) >= MOD)x -= MOD;return *this;}ModInt& operator-=(ModInt that){if ((x += MOD - that.x) >= MOD)x -= MOD;return *this;}ModInt& operator*=(ModInt that){x = (unsigned long long)x * that.x % MOD;return *this;}ModInt& operator/=(ModInt that) { return *this *= that.inverse(); }ModInt operator+(ModInt that) const { return ModInt(*this) += that; }ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }ModInt inverse() const{long long a = x, b = MOD, u = 1, v = 0;while (b) {long long t = a / b;a -= t * b;std::swap(a, b);u -= t * v;std::swap(u, v);}return ModInt(u);}bool operator==(ModInt that) const { return x == that.x; }bool operator!=(ModInt that) const { return x != that.x; }ModInt operator-() const{ModInt t;t.x = x == 0 ? 0 : Mod - x;return t;}};template <int MOD>ostream& operator<<(ostream& st, const ModInt<MOD> a){st << a.get();return st;};template <int MOD>ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k){ModInt<MOD> r = 1;while (k) {if (k & 1)r *= a;a *= a;k >>= 1;}return r;}template <typename T, int FAC_MAX>struct Comb {vector<T> fac, ifac;Comb(){fac.resize(FAC_MAX, 1);ifac.resize(FAC_MAX, 1);for (int i = 1; i < FAC_MAX; i++)fac[i] = fac[i - 1] * i;ifac[FAC_MAX - 1] = T(1) / fac[FAC_MAX - 1];for (int i = FAC_MAX - 2; i >= 1; i--)ifac[i] = ifac[i + 1] * T(i + 1);}T aPb(int a, int b){if (b < 0 || a < b)return T(0);return fac[a] * ifac[a - b];}T aCb(int a, int b){if (b < 0 || a < b)return T(0);return fac[a] * ifac[a - b] * ifac[b];}T nHk(int n, int k){if (n == 0 && k == 0)return T(1);if (n <= 0 || k < 0)return 0;return aCb(n + k - 1, k);}};typedef ModInt<998244353> mint;Comb<mint, 2000009> comb;struct dsu {public:dsu(): _n(0){}dsu(int n): _n(n), parent_or_size(n, -1){}int merge(int a, int b){assert(0 <= a && a < _n);assert(0 <= b && b < _n);int x = leader(a), y = leader(b);if (x == y)return x;if (-parent_or_size[x] < -parent_or_size[y])std::swap(x, y);parent_or_size[x] += parent_or_size[y];parent_or_size[y] = x;return x;}bool same(int a, int b){assert(0 <= a && a < _n);assert(0 <= b && b < _n);return leader(a) == leader(b);}// 頂点aの属する連結成分の代表元を返すint leader(int a){assert(0 <= a && a < _n);if (parent_or_size[a] < 0)return a;return parent_or_size[a] = leader(parent_or_size[a]);}// 頂点aの属する連結成分のサイズを返すint size(int a){assert(0 <= a && a < _n);return -parent_or_size[leader(a)];}// グラフを連結成分に分け、その情報を返します。// 返り値は「「一つの連結成分の頂点番号のリスト」のリスト」です。//(内側外側限らず)vector内でどの順番で頂点が格納されているかは未定義です。std::vector<std::vector<int>> groups(){std::vector<int> leader_buf(_n), group_size(_n);for (int i = 0; i < _n; i++) {leader_buf[i] = leader(i);group_size[leader_buf[i]]++;}std::vector<std::vector<int>> result(_n);for (int i = 0; i < _n; i++) {result[i].reserve(group_size[i]);}for (int i = 0; i < _n; i++) {result[leader_buf[i]].push_back(i);}result.erase(std::remove_if(result.begin(), result.end(),[&](const std::vector<int>& v) { return v.empty(); }),result.end());return result;}private:int _n;// root node: -1 * component size// otherwise: parentstd::vector<int> parent_or_size;};int main(){int n, m;cin >> n >> m;vector<int> a(n);for (int i = 0; i < n; i++)cin >> a[i];dsu uf(n);for (int i = 0; i < m; i++) {int u, v;cin >> u >> v;u--;v--;uf.merge(u, v);}vector<mint> v(n);for (int i = 0; i < n; i++) {v[uf.leader(i)] += a[i];}mint ans = 1;for (int i = 0; i < n; i++)ans *= v[uf.leader(i)];cout << ans << endl;}