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 | tancahn2380 |
提出日時 | 2018-04-07 15:26:09 |
言語 | C++11 (gcc 11.4.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,285 bytes |
コンパイル時間 | 1,016 ms |
コンパイル使用メモリ | 103,100 KB |
実行使用メモリ | 27,280 KB |
最終ジャッジ日時 | 2024-06-26 11:03:43 |
合計ジャッジ時間 | 5,015 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 |
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testcase_00 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
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testcase_18 | WA | - |
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testcase_22 | WA | - |
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testcase_27 | WA | - |
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testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | WA | - |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
testcase_44 | WA | - |
ソースコード
# include <iostream> # include <algorithm> # include <vector> # include <string> # include <set> # include <map> # include <cmath> # include <iomanip> # include <functional> # include <utility> # include <stack> # include <queue> # include <list> # include <tuple> # include <unordered_map> # include <numeric> # include <complex> # include <bitset> # include <random> # include <chrono> # include <cstdlib> # include <tuple> using namespace std; using LL = long long; using ULL = unsigned long long; constexpr int INF = 2147483647; constexpr int HINF = INF / 2; constexpr double DINF = 100000000000000000.0; constexpr double HDINF = 50000000000000000.0; constexpr long long LINF = 9223372036854775807; constexpr long long HLINF = 4500000000000000000; const double PI = acos(-1); int dx[4] = { 0,1,0,-1 }, dy[4] = { 1,0,-1,0 }; template <typename T_char>T_char TL(T_char cX) { return tolower(cX); }; template <typename T_char>T_char TU(T_char cX) { return toupper(cX); }; # define ALL(x) (x).begin(),(x).end() # define UNIQ(c) (c).erase(unique(ALL((c))),(c).end()) # define LOWER(s) transform(ALL((s)),(s).begin(),TL<char>) # define UPPER(s) transform(ALL((s)),(s).begin(),TU<char>) # define FOR(i,a,b) for(LL i=(a);i<(b);i++) # define RFOR(i,a,b) for(LL i=(a);i>=(b);i--) # define REP(i,n) FOR(i,0,n) # define INIT std::ios::sync_with_stdio(false);std::cin.tie(0) LL MOD = 1000000007; LL combi(LL N_, LL C_) { const int NUM_ = 1010101; static LL fact[NUM_ + 1], factr[NUM_ + 1], inv[NUM_ + 1]; if (fact[0] == 0) { inv[1] = fact[0] = factr[0] = 1; for (int i = 2; i <= NUM_; ++i) inv[i] = inv[MOD % i] * (MOD - MOD / i) % MOD; for (int i = 1; i <= NUM_; ++i) fact[i] = fact[i - 1] * i%MOD, factr[i] = factr[i - 1] * inv[i] % MOD; } if (C_<0 || C_>N_) return 0; return factr[C_] * fact[N_] % MOD*factr[N_ - C_] % MOD; } LL hcomb(int P_, int Q_) { return (P_ == 0 && Q_ == 0) ? 1 : combi(P_ + Q_ - 1, Q_); } LL modpow(LL a, LL n = MOD - 2) { LL r = 1; while (n) r = r*((n % 2) ? a : 1) % MOD, a = a*a%MOD, n >>= 1; return r; } int n; int main() { cin >> n; LL ans = 0; for (int i = n; i <= 2 * n; i++) { int y = (i - n) / 2; int x = n - y - 1; LL d = combi(x + y, x); d -= (x + y, y - 1); ans += d; } cout << ans << endl; }