結果
問題 | No.1885 Flat Permutation |
ユーザー | nawawan |
提出日時 | 2022-03-25 21:53:06 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 9 ms / 2,000 ms |
コード長 | 3,427 bytes |
コンパイル時間 | 1,982 ms |
コンパイル使用メモリ | 203,152 KB |
実行使用メモリ | 14,464 KB |
最終ジャッジ日時 | 2024-10-14 05:48:32 |
合計ジャッジ時間 | 3,823 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 5 ms
13,056 KB |
testcase_01 | AC | 5 ms
13,056 KB |
testcase_02 | AC | 7 ms
13,056 KB |
testcase_03 | AC | 6 ms
13,184 KB |
testcase_04 | AC | 5 ms
13,004 KB |
testcase_05 | AC | 5 ms
13,008 KB |
testcase_06 | AC | 6 ms
13,056 KB |
testcase_07 | AC | 5 ms
13,128 KB |
testcase_08 | AC | 7 ms
13,184 KB |
testcase_09 | AC | 6 ms
12,928 KB |
testcase_10 | AC | 6 ms
13,056 KB |
testcase_11 | AC | 5 ms
13,056 KB |
testcase_12 | AC | 6 ms
13,056 KB |
testcase_13 | AC | 6 ms
13,184 KB |
testcase_14 | AC | 5 ms
13,056 KB |
testcase_15 | AC | 7 ms
13,056 KB |
testcase_16 | AC | 5 ms
13,056 KB |
testcase_17 | AC | 5 ms
13,056 KB |
testcase_18 | AC | 6 ms
13,056 KB |
testcase_19 | AC | 9 ms
14,336 KB |
testcase_20 | AC | 9 ms
14,352 KB |
testcase_21 | AC | 8 ms
14,464 KB |
testcase_22 | AC | 8 ms
14,292 KB |
testcase_23 | AC | 5 ms
12,928 KB |
testcase_24 | AC | 5 ms
12,928 KB |
testcase_25 | AC | 7 ms
13,056 KB |
testcase_26 | AC | 7 ms
13,056 KB |
testcase_27 | AC | 8 ms
14,336 KB |
testcase_28 | AC | 7 ms
14,464 KB |
testcase_29 | AC | 8 ms
14,464 KB |
testcase_30 | AC | 9 ms
14,416 KB |
testcase_31 | AC | 7 ms
14,384 KB |
testcase_32 | AC | 6 ms
13,132 KB |
testcase_33 | AC | 6 ms
13,056 KB |
testcase_34 | AC | 7 ms
13,056 KB |
testcase_35 | AC | 8 ms
14,464 KB |
testcase_36 | AC | 7 ms
14,464 KB |
testcase_37 | AC | 5 ms
13,184 KB |
testcase_38 | AC | 6 ms
13,056 KB |
testcase_39 | AC | 5 ms
13,056 KB |
testcase_40 | AC | 6 ms
13,140 KB |
testcase_41 | AC | 6 ms
13,440 KB |
testcase_42 | AC | 6 ms
13,164 KB |
testcase_43 | AC | 8 ms
14,464 KB |
testcase_44 | AC | 8 ms
14,336 KB |
testcase_45 | AC | 8 ms
14,464 KB |
testcase_46 | AC | 7 ms
14,464 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; template<const int MOD> struct modint{ long long val; modint(): val(0) {} modint(long long x){ if(x < 0) val = x % MOD + MOD; else val = x % MOD; } modint(const modint &t){ val = t.val; } modint& operator =(const modint m){ val = m.val; return *this; } modint operator -(){ return modint(-val); } modint& operator-=(const modint &m){ val -= m.val; if(val < 0) val += MOD; return *this; } modint& operator+=(const modint &m){ val += m.val; if(val >= MOD) val -= MOD; return *this; } modint& operator*=(const modint &m){ val *= m.val; val %= MOD; return *this; } modint& operator/=(modint m){ *this *= m.inv(); return *this; } modint inv(){ long long x = 1, y = 0; long long a = val, b = MOD; while(b != 0){ long long t = a / b; a -= t * b; x -= t * y; swap(a, b); swap(x, y); } x %= MOD; if(x < 0) x += MOD; return modint(x); } modint pow(long long k){ long long res = 1; long long v = val; if(v == 0) return modint(0); while(k > 0){ if(k & 1) res = res * v % MOD; v = v * v % MOD; k >>= 1; } return modint(res); } bool operator==(const modint &m){ return val == m.val; } modint operator+(const modint &m){ return modint(*this) += m; } modint operator-(const modint &m){ return modint(*this) -= m; } modint operator*(const modint &m){ return modint(*this) *= m; } modint operator/(const modint &m){ return modint(*this) /= m; } bool operator!=(const modint &m){ return modint(*this).val != m.val; } bool operator!=(const int &m){ return modint(*this).val != m; } }; const int MOD = 998244353; using mint = modint<MOD>; const int MAX = 410000; mint fac[MAX], finv[MAX], inv[MAX]; //MAX < MOD void COMinit(){ fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for(int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i; inv[i] = mint(MOD) - inv[MOD % i] * (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]; } int main(){ int N; cin >> N; int X, Y; cin >> X >> Y; if(X < Y) swap(X, Y); int t = abs(X - Y); if(t == 1){ if(X == N) cout << 1 << endl; else if(Y == 1) cout << 1 << endl; else cout << 0 << endl; return 0; } int l = -1, r = -1; if(X == N){ if(Y == 1){ int te = X - Y; l = 0, r = te + 1; } else{ int te = X - Y - 1; l = 0, r = te + 1; } } else{ if(Y == 1){ int te = X - 1 - Y; l = 0, r = te + 1; } else{ int te = X - 1 - (Y + 1); l = 0, r = te + 1; } } vector<mint> dp(r); dp[l] = 1; for(int i = 1; i < r; i++){ dp[i] += dp[i - 1]; if(i >= 3) dp[i] += dp[i - 3]; } cout << dp[r - 1].val << endl; }