結果
問題 | No.2494 Sum within Components |
ユーザー | shinchan |
提出日時 | 2023-09-05 11:54:51 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 62 ms / 2,000 ms |
コード長 | 3,849 bytes |
コンパイル時間 | 2,549 ms |
コンパイル使用メモリ | 205,820 KB |
実行使用メモリ | 8,704 KB |
最終ジャッジ日時 | 2024-06-23 07:32:04 |
合計ジャッジ時間 | 4,237 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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; #define all(v) (v).begin(),(v).end() #define pb(a) push_back(a) #define rep(i, n) for(int i=0;i<n;i++) #define foa(e, v) for(auto& e : v) using ll = long long; const ll MOD7 = 1000000007, MOD998 = 998244353, INF = (1LL << 60); #define dout(a) cout<<fixed<<setprecision(10)<<a<<endl; template<int MOD> struct Modint { long long val; constexpr Modint(long long v = 0) noexcept : val(v % MOD) { if (val < 0) val += MOD; } constexpr int mod() const { return MOD; } constexpr long long value() const { return val; } constexpr Modint operator - () const noexcept { return val ? MOD - val : 0; } constexpr Modint operator + (const Modint& r) const noexcept { return Modint(*this) += r; } constexpr Modint operator - (const Modint& r) const noexcept { return Modint(*this) -= r; } constexpr Modint operator * (const Modint& r) const noexcept { return Modint(*this) *= r; } constexpr Modint operator / (const Modint& r) const noexcept { return Modint(*this) /= r; } constexpr Modint& operator += (const Modint& r) noexcept { val += r.val; if (val >= MOD) val -= MOD; return *this; } constexpr Modint& operator -= (const Modint& r) noexcept { val -= r.val; if (val < 0) val += MOD; return *this; } constexpr Modint& operator *= (const Modint& r) noexcept { val = val * r.val % MOD; return *this; } constexpr Modint& operator /= (const Modint& r) noexcept { long long a = r.val, b = MOD, u = 1, v = 0; while (b) { long long 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; } constexpr bool operator == (const Modint& r) const noexcept { return this->val == r.val; } constexpr bool operator != (const Modint& r) const noexcept { return this->val != r.val; } friend constexpr istream& operator >> (istream& is, Modint<MOD>& x) noexcept { is >> x.val; x.val %= MOD; if (x.val < 0) x.val += MOD; return is; } friend constexpr ostream& operator << (ostream& os, const Modint<MOD>& x) noexcept { return os << x.val; } constexpr Modint<MOD> pow(long long n) noexcept { if (n == 0) return 1; if (n < 0) return this->pow(-n).inv(); Modint<MOD> ret = pow(n >> 1); ret *= ret; if (n & 1) ret *= *this; return ret; } constexpr Modint<MOD> inv() noexcept { long long a = this->val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b, swap(a, b); u -= t * v, swap(u, v); } return Modint<MOD>(u); } }; const int MOD = MOD998; using mint = Modint<MOD>; struct UnionFind { vector<int> par; vector<mint> sum; UnionFind(int n, vector<mint> a) :par(n, -1), sum(a) { } void init(int n) { par.assign(n, -1); } int root(int x) { if (par[x] < 0) return x; else return par[x] = root(par[x]); } bool connect(int x, int y) { x = root(x); y = root(y); if (x == y) return false; if (par[x] > par[y]) swap(x, y); par[x] += par[y]; par[y] = x; sum[x] += sum[y]; return true; } int size(int x) { return -par[root(x)]; } }; int main() { cin.tie(0); ios::sync_with_stdio(false); ll n, m; cin >> n >> m; vector<mint> a(n); rep(i, n) cin >> a[i]; UnionFind uf(n, a); rep(i, m) { int x, y; cin >> x >> y; x --; y --; uf.connect(x, y); } mint ans = 1; rep(i, n) { ans *= uf.sum[uf.root(i)]; } cout << ans << endl; return 0; }