結果
問題 | No.2598 Kadomatsu on Tree |
ユーザー | ゆにぽけ |
提出日時 | 2024-01-01 09:14:41 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 226 ms / 2,000 ms |
コード長 | 4,434 bytes |
コンパイル時間 | 1,947 ms |
コンパイル使用メモリ | 139,884 KB |
実行使用メモリ | 21,300 KB |
最終ジャッジ日時 | 2024-09-27 17:14:57 |
合計ジャッジ時間 | 11,727 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 4 ms
6,940 KB |
testcase_14 | AC | 5 ms
6,940 KB |
testcase_15 | AC | 4 ms
6,940 KB |
testcase_16 | AC | 5 ms
6,944 KB |
testcase_17 | AC | 3 ms
6,944 KB |
testcase_18 | AC | 4 ms
6,940 KB |
testcase_19 | AC | 4 ms
6,940 KB |
testcase_20 | AC | 3 ms
6,940 KB |
testcase_21 | AC | 4 ms
6,940 KB |
testcase_22 | AC | 4 ms
6,940 KB |
testcase_23 | AC | 205 ms
15,260 KB |
testcase_24 | AC | 216 ms
15,608 KB |
testcase_25 | AC | 215 ms
15,624 KB |
testcase_26 | AC | 208 ms
15,260 KB |
testcase_27 | AC | 209 ms
15,392 KB |
testcase_28 | AC | 207 ms
15,584 KB |
testcase_29 | AC | 211 ms
15,632 KB |
testcase_30 | AC | 210 ms
15,344 KB |
testcase_31 | AC | 208 ms
15,636 KB |
testcase_32 | AC | 206 ms
15,504 KB |
testcase_33 | AC | 212 ms
15,788 KB |
testcase_34 | AC | 206 ms
15,132 KB |
testcase_35 | AC | 217 ms
15,880 KB |
testcase_36 | AC | 211 ms
15,736 KB |
testcase_37 | AC | 209 ms
15,696 KB |
testcase_38 | AC | 214 ms
15,852 KB |
testcase_39 | AC | 214 ms
15,812 KB |
testcase_40 | AC | 225 ms
15,680 KB |
testcase_41 | AC | 226 ms
15,700 KB |
testcase_42 | AC | 217 ms
15,776 KB |
testcase_43 | AC | 220 ms
15,792 KB |
testcase_44 | AC | 215 ms
15,696 KB |
testcase_45 | AC | 216 ms
15,672 KB |
testcase_46 | AC | 213 ms
15,740 KB |
testcase_47 | AC | 220 ms
15,824 KB |
testcase_48 | AC | 226 ms
20,560 KB |
testcase_49 | AC | 14 ms
6,944 KB |
testcase_50 | AC | 138 ms
14,336 KB |
testcase_51 | AC | 29 ms
6,944 KB |
testcase_52 | AC | 54 ms
8,064 KB |
testcase_53 | AC | 57 ms
9,104 KB |
testcase_54 | AC | 48 ms
8,264 KB |
testcase_55 | AC | 17 ms
6,944 KB |
testcase_56 | AC | 88 ms
12,252 KB |
testcase_57 | AC | 30 ms
6,944 KB |
testcase_58 | AC | 178 ms
15,512 KB |
testcase_59 | AC | 172 ms
15,528 KB |
testcase_60 | AC | 210 ms
20,276 KB |
testcase_61 | AC | 221 ms
21,300 KB |
testcase_62 | AC | 208 ms
19,824 KB |
ソースコード
#include <iostream> #include <string> #include <vector> #include <algorithm> #include <array> #include <cctype> #include <cstring> #include <cstdlib> #include <cassert> #include <cmath> #include <ctime> #include <iomanip> #include <numeric> #include <stack> #include <queue> #include <map> #include <unordered_map> #include <set> #include <unordered_set> #include <bitset> #include <random> #include <utility> #include <functional> using namespace std; template<int m> struct modint { private: unsigned int value; static constexpr int mod() {return m;} public: constexpr modint(const long long x = 0) noexcept { long long y = x; if(y < 0 || y >= mod()) { y %= mod(); if(y < 0) y += mod(); } value = (unsigned int)y; } constexpr unsigned int val() noexcept {return value;} constexpr modint &operator+=(const modint &other) noexcept { value += other.value; if(value >= mod()) value -= mod(); return *this; } constexpr modint &operator-=(const modint &other) noexcept { unsigned int x = value; if(x < other.value) x += mod(); x -= other.value; value = x; return *this; } constexpr modint &operator*=(const modint &other) noexcept { unsigned long long x = value; x *= other.value; value = (unsigned int) (x % mod()); return *this; } constexpr modint &operator/=(const modint &other) noexcept { return *this *= other.inverse(); } constexpr modint inverse() const noexcept { assert(value); long long a = value,b = mod(),x = 1,y = 0; while(b) { long long q = a/b; a -= q*b; swap(a,b); x -= q*y; swap(x,y); } return modint(x); } constexpr modint power(long long N) const noexcept { assert(N >= 0); modint p = *this,ret = 1; while(N) { if(N & 1) ret *= p; p *= p; N >>= 1; } return ret; } constexpr modint operator+() {return *this;} constexpr modint operator-() {return modint() - *this;} constexpr modint &operator++(int) noexcept {return *this += 1;} constexpr modint &operator--(int) noexcept {return *this -= 1;} friend modint operator+(const modint& lhs, const modint& rhs) {return modint(lhs) += rhs;} friend modint operator-(const modint& lhs, const modint& rhs) {return modint(lhs) -= rhs;} friend modint operator*(const modint& lhs, const modint& rhs) {return modint(lhs) *= rhs;} friend modint operator/(const modint& lhs, const modint& rhs) {return modint(lhs) /= rhs;} friend ostream &operator<<(ostream &os,const modint &x) {return os << x.value;} }; using mint = modint<998244353>; /* using mint = modint<1000000007>; */ template<class S> struct combination { vector<S> f,invf; combination(int N = 0) : f(1,1),invf(1,1) { update(N); } void update(int N) { if((int)f.size() > N) return; int pi = (int)f.size(); N = max(N,pi*2); f.resize(N+1),invf.resize(N+1); for(int i = pi;i <= N;i++) f[i] = f[i-1]*i; invf[N] = S(1)/f[N]; for(int i = N-1;i >= pi;i--) invf[i] = invf[i+1]*(i+1); } S factorial(int N) { update(N); return f[N]; } S invfactorial(int N) { update(N); return invf[N]; } S P(int N,int K) { assert(0 <= K && K <= N); update(N); return f[N]*invf[N-K]; } S C(int N,int K) { assert(0 <= K && K <= N); update(N); return f[N]*invf[K]*invf[N-K]; } S H(int N,int K) { if(!N) return K == 0 ? 1:0; return C(N+K-1,K); } }; combination<mint> C; void solve() { int N; cin >> N; vector<vector<int>> G(N); for(int i = 1;i < N;i++) { int u,v; cin >> u >> v; u--; v--; G[u].push_back(v); G[v].push_back(u); } vector<int> ch(N); auto dfs = [&](auto dfs,int u,int p) -> void { ch[u] = 1; for(int v : G[u]) if(v != p) { dfs(dfs,v,u); ch[u] += ch[v]; } }; dfs(dfs,0,-1); vector<int> A(N); for(int i = 0;i < N;i++) cin >> A[i]; mint ans = 0; for(int u = 0;u < N;u++) { vector<int> P,Q; for(int v : G[u]) { if(ch[v] >= ch[u]) { if(A[v] > A[u]) P.push_back(N - ch[u]); else if(A[v] < A[u]) Q.push_back(N - ch[u]); } else { if(A[v] > A[u]) P.push_back(ch[v]); else if(A[v] < A[u]) Q.push_back(ch[v]); } } { mint S = 0; for(int i = 0;i < (int)P.size();i++) { ans += S * P[i]; S += P[i]; } } { mint S = 0; for(int i = 0;i < (int)Q.size();i++) { ans += S * Q[i]; S += Q[i]; } } } cout << ans << endl; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int tt = 1; /* cin >> tt; */ while(tt--) solve(); }