結果
問題 | No.336 門松列列 |
ユーザー | paruki |
提出日時 | 2016-06-21 10:39:05 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 26 ms / 2,000 ms |
コード長 | 2,835 bytes |
コンパイル時間 | 2,041 ms |
コンパイル使用メモリ | 171,068 KB |
実行使用メモリ | 19,200 KB |
最終ジャッジ日時 | 2024-06-12 01:12:43 |
合計ジャッジ時間 | 2,705 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 | 21 ms
15,872 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 26 ms
19,200 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 5 ms
5,376 KB |
testcase_07 | AC | 11 ms
8,832 KB |
testcase_08 | AC | 17 ms
13,312 KB |
testcase_09 | AC | 25 ms
18,560 KB |
testcase_10 | AC | 26 ms
18,944 KB |
testcase_11 | AC | 26 ms
19,200 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; #define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i)) #define rep(i,j) FOR(i,0,j) #define each(x,y) for(auto &(x):(y)) #define mp make_pair #define all(x) (x).begin(),(x).end() #define debug(x) cout<<#x<<": "<<(x)<<endl #define smax(x,y) (x)=max((x),(y)) #define smin(x,y) (x)=min((x),(y)) #define MEM(x,y) memset((x),(y),sizeof (x)) #define sz(x) (int)(x).size() typedef long long ll; typedef pair<int, int> pii; typedef vector<int> vi; typedef vector<ll> vll; template<int MOD> class ModInt{ public: ModInt():value(0){} ModInt(int val):value(val<0?MOD+val%MOD:val%MOD){ } ModInt& operator+=(ModInt that){ value = value+that.value; if(value>=MOD)value-=MOD; return *this; } ModInt& operator-=(ModInt that){ value -= that.value; if(value<0)value+=MOD; return *this; } ModInt& operator*=(ModInt that){ value = (int)((long long)value * that.value % 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 operator^(long long k) const{ ModInt n = *this, res = 1; while(k){ if(k & 1)res *= n; n *= n; k >>= 1; } return res; } ModInt inverse() const { long long a = value, 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(u); } int toi() const{ return value; } private: int value; }; typedef ModInt<1000000007> mint; ostream& operator<<(ostream& os, const mint& x){ os << x.toi(); return os; } vector<vector<int>> combinations(int n, int mod){ auto res = vector<vector<int>>(n + 1, vector<int>(n + 1)); rep(i, n + 1) res[i][0] = 1; for(int i = 1; i <= n; ++i) for(int j = 1; j <= i; ++j) res[i][j] = (res[i - 1][j - 1] + res[i - 1][j]) % mod; return res; } const int MAX = 2017, MOD = (int)1e9 + 7; int N; mint dp[MAX]; int main(){ ios::sync_with_stdio(0); cin.tie(0); cin >> N; if(N < 3){ cout << 0 << endl; return 0; } dp[0] = dp[1] = dp[2] = 1; auto C = combinations(N, MOD); for(int i = 3; i <= N; ++i){ for(int j = 0; j < i; j += 2) dp[i] += dp[j] * dp[i - 1 - j] * C[i - 1][j]; } mint ans = dp[N] * 2; cout << ans << endl; }