結果
問題 | No.533 Mysterious Stairs |
ユーザー | はまやんはまやん |
提出日時 | 2017-06-23 22:54:32 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 21 ms / 5,000 ms |
コード長 | 2,778 bytes |
コンパイル時間 | 1,636 ms |
コンパイル使用メモリ | 168,216 KB |
実行使用メモリ | 19,312 KB |
最終ジャッジ日時 | 2024-10-04 07:46:13 |
合計ジャッジ時間 | 3,049 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | 14 ms
19,120 KB |
testcase_01 | AC | 14 ms
19,116 KB |
testcase_02 | AC | 15 ms
19,192 KB |
testcase_03 | AC | 15 ms
19,092 KB |
testcase_04 | AC | 15 ms
19,168 KB |
testcase_05 | AC | 15 ms
19,220 KB |
testcase_06 | AC | 15 ms
19,180 KB |
testcase_07 | AC | 14 ms
19,132 KB |
testcase_08 | AC | 15 ms
19,208 KB |
testcase_09 | AC | 14 ms
19,224 KB |
testcase_10 | AC | 14 ms
19,264 KB |
testcase_11 | AC | 14 ms
19,108 KB |
testcase_12 | AC | 15 ms
19,220 KB |
testcase_13 | AC | 14 ms
19,088 KB |
testcase_14 | AC | 14 ms
19,140 KB |
testcase_15 | AC | 16 ms
19,176 KB |
testcase_16 | AC | 15 ms
19,312 KB |
testcase_17 | AC | 15 ms
19,208 KB |
testcase_18 | AC | 15 ms
19,296 KB |
testcase_19 | AC | 15 ms
19,112 KB |
testcase_20 | AC | 16 ms
19,144 KB |
testcase_21 | AC | 16 ms
19,156 KB |
testcase_22 | AC | 17 ms
19,116 KB |
testcase_23 | AC | 21 ms
19,144 KB |
testcase_24 | AC | 21 ms
19,224 KB |
testcase_25 | AC | 15 ms
19,192 KB |
testcase_26 | AC | 20 ms
19,284 KB |
testcase_27 | AC | 17 ms
19,124 KB |
ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } //--------------------------------------------------------------------------------------------------- template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) { } ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } int get() const { return (int)x; } ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; } ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % 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 inverse() const { long long a = x, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } return ModInt(u); } bool operator==(ModInt that) const { return x == that.x; } bool operator!=(ModInt that) const { return x != that.x; } ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; } }; template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; } typedef ModInt<1000000007> mint; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ int N; mint dp[1010101][4]; //--------------------------------------------------------------------------------------------------- void _main() { cin >> N; dp[0][0] = 1; rep(i, 0, N) rep(j, 0, 4) { rep(k, 1, 4) if(k != j){ dp[i + k][k] += dp[i][j]; } } mint ans = 0; rep(j, 0, 4) ans += dp[N][j]; cout << ans.get() << endl; }