結果
問題 | No.1302 Random Tree Score |
ユーザー | suta28407928 |
提出日時 | 2020-11-28 02:07:27 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 514 ms / 3,000 ms |
コード長 | 3,607 bytes |
コンパイル時間 | 6,142 ms |
コンパイル使用メモリ | 273,276 KB |
実行使用メモリ | 20,252 KB |
最終ジャッジ日時 | 2024-09-12 21:46:15 |
合計ジャッジ時間 | 10,956 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
(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 | 19 ms
15,336 KB |
testcase_01 | AC | 19 ms
15,272 KB |
testcase_02 | AC | 105 ms
16,712 KB |
testcase_03 | AC | 237 ms
17,740 KB |
testcase_04 | AC | 102 ms
16,688 KB |
testcase_05 | AC | 514 ms
20,204 KB |
testcase_06 | AC | 415 ms
20,204 KB |
testcase_07 | AC | 99 ms
16,732 KB |
testcase_08 | AC | 262 ms
17,928 KB |
testcase_09 | AC | 401 ms
20,240 KB |
testcase_10 | AC | 431 ms
19,876 KB |
testcase_11 | AC | 97 ms
16,536 KB |
testcase_12 | AC | 483 ms
20,140 KB |
testcase_13 | AC | 20 ms
15,336 KB |
testcase_14 | AC | 404 ms
20,248 KB |
testcase_15 | AC | 467 ms
20,252 KB |
testcase_16 | AC | 18 ms
15,256 KB |
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; #define DEBUG #ifdef DEBUG template <class T, class U> ostream &operator<<(ostream &os, const pair<T, U> &p) { os << '(' << p.first << ',' << p.second << ')'; return os; } template <class T> ostream &operator<<(ostream &os, const vector<T> &v) { os << '{'; for(int i = 0; i < (int)v.size(); i++) { if(i) { os << ','; } os << v[i]; } os << '}'; return os; } void debugg() { cerr << endl; } template <class T, class... Args> void debugg(const T &x, const Args &... args) { cerr << " " << x; debugg(args...); } #define debug(...) \ cerr << __LINE__ << " [" << #__VA_ARGS__ << "]: ", debugg(__VA_ARGS__) #define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl #else #define debug(...) (void(0)) #define dump(x) (void(0)) #endif using namespace std; typedef long long ll; typedef vector<ll> vl; typedef vector<vl> vvl; typedef vector<char> vc; typedef vector<string> vs; typedef vector<bool> vb; typedef vector<double> vd; typedef pair<ll,ll> P; typedef pair<int,int> pii; typedef vector<P> vpl; typedef tuple<ll,ll,ll> tapu; #define rep(i,n) for(int i=0; i<(n); i++) #define REP(i,a,b) for(int i=(a); i<(b); i++) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() const int inf = 1<<30; const ll linf = 1LL<<62; const int MAX = 510000; int dy[8] = {0,-1,0,1,1,-1,-1,1}; int dx[8] = {-1,0,1,0,1,-1,1,-1}; const double pi = acos(-1); const double eps = 1e-7; template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){ if(a>b){ a = b; return true; } else return false; } template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){ if(a<b){ a = b; return true; } else return false; } template<typename T> inline void print(T &a){ int sz = a.size(); for(auto itr = a.begin(); itr != a.end(); itr++){ cout << *itr; sz--; if(sz) cout << " "; } cout << "\n"; } template<typename T1,typename T2> inline void print2(T1 a, T2 b){ cout << a << " " << b << "\n"; } template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){ cout << a << " " << b << " " << c << "\n"; } void mark() {cout << "#" << "\n";} ll pcount(ll x) {return __builtin_popcountll(x);} //const int mod = 1e9 + 7; const int mod = 998244353; vector<ll> fac(MAX), finv(MAX), inv(MAX); void comInit(){ fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for(ll i=2; i<MAX; i++){ fac[i] = fac[i-1]*i % mod; inv[i] = mod - inv[mod%i] * (mod/i) % mod; finv[i] = finv[i-1] * inv[i] % mod; } } ll com(ll n, ll k){ if(n < k) return 0; if(n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n-k] % mod) % mod; } ll modpow(ll x, ll n, ll mod){ ll res = 1; while(n > 0){ if(n & 1) res = res * x % mod; x = x * x % mod; n >>= 1; } return res; } using mint = modint998244353; int main(){ ll n; cin >> n; vector<mint> a(n); comInit(); rep(i,n-1){ a[i] = finv[i] * (i+1) % mod; } auto polypow = [](vector<mint> &a, ll N) -> vector<mint> { int n = a.size(); vector<mint> res(n,0); res[0] = 1; while(N > 0){ if(N & 1) res = convolution(res,a); a = convolution(a,a); while(res.size() > n-1) res.pop_back(); while(a.size() > n-1) a.pop_back(); N >>= 1; } return res; }; auto b = polypow(a,n); mint ans = b[n-2] * fac[n-2] / modpow(n,n-2,mod); cout << ans.val() << "\n"; }