結果
問題 | No.660 家を通り過ぎないランダムウォーク問題 |
ユーザー | はまやんはまやん |
提出日時 | 2018-03-03 00:08:57 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 136 ms / 2,000 ms |
コード長 | 4,011 bytes |
コンパイル時間 | 1,718 ms |
コンパイル使用メモリ | 177,716 KB |
実行使用メモリ | 11,008 KB |
最終ジャッジ日時 | 2024-06-23 00:16:56 |
合計ジャッジ時間 | 8,114 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 118 ms
6,272 KB |
testcase_01 | AC | 118 ms
6,528 KB |
testcase_02 | AC | 127 ms
6,272 KB |
testcase_03 | AC | 119 ms
6,528 KB |
testcase_04 | AC | 118 ms
6,400 KB |
testcase_05 | AC | 120 ms
6,528 KB |
testcase_06 | AC | 118 ms
6,400 KB |
testcase_07 | AC | 119 ms
6,528 KB |
testcase_08 | AC | 119 ms
6,400 KB |
testcase_09 | AC | 124 ms
6,528 KB |
testcase_10 | AC | 120 ms
6,400 KB |
testcase_11 | AC | 118 ms
6,528 KB |
testcase_12 | AC | 118 ms
6,400 KB |
testcase_13 | AC | 118 ms
6,528 KB |
testcase_14 | AC | 118 ms
6,400 KB |
testcase_15 | AC | 118 ms
6,528 KB |
testcase_16 | AC | 119 ms
6,528 KB |
testcase_17 | AC | 118 ms
6,528 KB |
testcase_18 | AC | 118 ms
6,528 KB |
testcase_19 | AC | 121 ms
6,400 KB |
testcase_20 | AC | 121 ms
6,400 KB |
testcase_21 | AC | 117 ms
6,528 KB |
testcase_22 | AC | 117 ms
6,528 KB |
testcase_23 | AC | 117 ms
6,400 KB |
testcase_24 | AC | 118 ms
6,400 KB |
testcase_25 | AC | 118 ms
6,272 KB |
testcase_26 | AC | 122 ms
6,272 KB |
testcase_27 | AC | 116 ms
6,400 KB |
testcase_28 | AC | 119 ms
6,400 KB |
testcase_29 | AC | 116 ms
6,528 KB |
testcase_30 | AC | 117 ms
6,400 KB |
testcase_31 | AC | 117 ms
6,272 KB |
testcase_32 | AC | 123 ms
6,400 KB |
testcase_33 | AC | 121 ms
6,528 KB |
testcase_34 | AC | 118 ms
6,656 KB |
testcase_35 | AC | 122 ms
7,040 KB |
testcase_36 | AC | 118 ms
7,168 KB |
testcase_37 | AC | 119 ms
7,040 KB |
testcase_38 | AC | 124 ms
8,448 KB |
testcase_39 | AC | 125 ms
8,576 KB |
testcase_40 | AC | 127 ms
8,448 KB |
testcase_41 | AC | 132 ms
9,856 KB |
testcase_42 | AC | 132 ms
10,112 KB |
testcase_43 | AC | 135 ms
10,496 KB |
testcase_44 | AC | 136 ms
11,008 KB |
ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #define rrep(i,a,b) for(int i=a;i>=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; } //--------------------------------------------------------------------------------------------------- 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> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; }; 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; } template<typename T, int FAC_MAX> struct Comb { vector<T> fac, ifac; Comb() {fac.resize(FAC_MAX, 1); ifac.resize(FAC_MAX, 1);rep(i, 1, FAC_MAX) fac[i] = fac[i - 1] * i; rep(i, 1, FAC_MAX) ifac[i] = T(1) / fac[i];} T aPb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b]; } T aCb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b] * ifac[b]; } T nHk(int n, int k) { if (n == 0 && k == 0) return T(1); if (n <= 0 || k < 0) return 0; return aCb(n + k - 1, k); }}; // nHk = (n+k-1)Ck typedef ModInt<1000000007> mint; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ int N; Comb<mint, 401010> com; map<int, mint> dp; //--------------------------------------------------------------------------------------------------- void _main() { cin >> N; mint ans = 1; for (int n = N + 2; n <= 2 * N; n += 2) { int y = (n - N) / 2; int x = n - y - 1; mint d = com.aCb(x + y, x); d -= com.aCb(x + y, y - 1); // y = x - Nで対称移動する //for (int m = N; m < n; m += 2) d -= dp[m] * com.aCb(n - m, (n - m) / 2); ans += d; dp[n] = d; } cout << ans << endl; }