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 | Yang33 |
提出日時 | 2019-01-22 12:42:53 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 13 ms / 2,000 ms |
コード長 | 4,025 bytes |
コンパイル時間 | 1,645 ms |
コンパイル使用メモリ | 170,296 KB |
実行使用メモリ | 9,600 KB |
最終ジャッジ日時 | 2024-09-15 13:31:59 |
合計ジャッジ時間 | 3,524 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 |
---|---|---|
testcase_00 | AC | 11 ms
9,472 KB |
testcase_01 | AC | 10 ms
9,344 KB |
testcase_02 | AC | 11 ms
9,472 KB |
testcase_03 | AC | 10 ms
9,472 KB |
testcase_04 | AC | 10 ms
9,344 KB |
testcase_05 | AC | 10 ms
9,472 KB |
testcase_06 | AC | 10 ms
9,472 KB |
testcase_07 | AC | 10 ms
9,472 KB |
testcase_08 | AC | 10 ms
9,600 KB |
testcase_09 | AC | 10 ms
9,472 KB |
testcase_10 | AC | 10 ms
9,472 KB |
testcase_11 | AC | 11 ms
9,472 KB |
testcase_12 | AC | 10 ms
9,344 KB |
testcase_13 | AC | 10 ms
9,472 KB |
testcase_14 | AC | 10 ms
9,472 KB |
testcase_15 | AC | 10 ms
9,472 KB |
testcase_16 | AC | 10 ms
9,344 KB |
testcase_17 | AC | 10 ms
9,472 KB |
testcase_18 | AC | 10 ms
9,472 KB |
testcase_19 | AC | 10 ms
9,472 KB |
testcase_20 | AC | 10 ms
9,472 KB |
testcase_21 | AC | 10 ms
9,472 KB |
testcase_22 | AC | 10 ms
9,472 KB |
testcase_23 | AC | 10 ms
9,344 KB |
testcase_24 | AC | 10 ms
9,472 KB |
testcase_25 | AC | 10 ms
9,600 KB |
testcase_26 | AC | 10 ms
9,344 KB |
testcase_27 | AC | 10 ms
9,344 KB |
testcase_28 | AC | 10 ms
9,472 KB |
testcase_29 | AC | 10 ms
9,472 KB |
testcase_30 | AC | 11 ms
9,472 KB |
testcase_31 | AC | 10 ms
9,600 KB |
testcase_32 | AC | 10 ms
9,472 KB |
testcase_33 | AC | 10 ms
9,472 KB |
testcase_34 | AC | 10 ms
9,472 KB |
testcase_35 | AC | 11 ms
9,472 KB |
testcase_36 | AC | 10 ms
9,472 KB |
testcase_37 | AC | 11 ms
9,472 KB |
testcase_38 | AC | 11 ms
9,472 KB |
testcase_39 | AC | 11 ms
9,472 KB |
testcase_40 | AC | 11 ms
9,472 KB |
testcase_41 | AC | 11 ms
9,472 KB |
testcase_42 | AC | 12 ms
9,472 KB |
testcase_43 | AC | 12 ms
9,472 KB |
testcase_44 | AC | 13 ms
9,472 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using VS = vector<string>; using LL = long long; using VI = vector<int>; using VVI = vector<VI>; using PII = pair<int, int>; using PLL = pair<LL, LL>; using VL = vector<LL>; using VVL = vector<VL>; #define ALL(a) begin((a)),end((a)) #define RALL(a) (a).rbegin(), (a).rend() #define SZ(a) int((a).size()) #define SORT(c) sort(ALL((c))) #define RSORT(c) sort(RALL((c))) #define UNIQ(c) (c).erase(unique(ALL((c))), end((c))) #define FOR(i, s, e) for (int(i) = (s); (i) < (e); (i)++) #define FORR(i, s, e) for (int(i) = (s); (i) > (e); (i)--) //#pragma GCC optimize ("-O3") #ifdef YANG33 #include "mydebug.hpp" #else #define DD(x) #endif const int INF = 1e9; const LL LINF = 1e16; const LL MOD = 1000000007; const double PI = acos(-1.0); int DX[8] = { 0, 0, 1, -1, 1, 1, -1, -1 }; int DY[8] = { 1, -1, 0, 0, 1, -1, 1, -1 }; /* ----- 2019/01/22 Problem: yukicoder 660 / Link: http://yukicoder.me/problems/no/660 ----- */ /* ------問題------ -----問題ここまで----- */ /* -----解説等----- ----解説ここまで---- */ template <::std::uint_fast32_t MODULO> class modint { public: using uint32 = ::std::uint_fast32_t; using uint64 = ::std::uint_fast64_t; using value_type = uint32; uint32 a; modint() noexcept : a(0) {}modint(long long x)noexcept :a(x%MODULO) {}modint operator+(const modint &o) const noexcept { return a + o.a < MODULO ? modint(a + o.a) : modint(a + o.a - MODULO); }modint operator-(const modint &o) const noexcept { return modint(a < o.a ? a + MODULO - o.a : a - o.a); }modint operator*(const modint &o) const noexcept { return modint(static_cast<uint64>(a) * o.a % MODULO); }modint operator/(const modint &o) const { return modint(static_cast<uint64>(a) * (~o).a % MODULO); }modint &operator+=(const modint &o) noexcept { return *this = *this + o; }modint &operator-=(const modint &o) noexcept { return *this = *this - o; }modint &operator*=(const modint &o) noexcept { return *this = *this * o; }modint &operator/=(const modint &o) { return *this = *this / o; }modint operator~() const noexcept { return pow(MODULO - 2); }modint operator-() const noexcept { return a ? modint(MODULO - a) : *this; }modint operator++() noexcept { return a == MODULO - 1 ? a = 0 : ++a, *this; }modint operator--() noexcept { return a ? --a : a = MODULO - 1, *this; }bool operator==(const modint &o) const noexcept { return a == o.a; }bool operator!=(const modint &o) const noexcept { return a != o.a; }bool operator<(const modint &o) const noexcept { return a < o.a; }bool operator<=(const modint &o) const noexcept { return a <= o.a; }bool operator>(const modint &o) const noexcept { return a > o.a; }bool operator>=(const modint &o) const noexcept { return a >= o.a; }explicit operator bool() const noexcept { return a; }explicit operator uint32() const noexcept { return a; }modint pow(uint32 x) const noexcept { uint64 t = a, u = 1; while (x) { if (x & 1)u = u * t % MODULO; t = (t * t) % MODULO; x >>= 1; } return modint(u); } uint32 get() const noexcept { return a; } }; using mint = modint<MOD>; const mint mintzero = mint(0); const mint mintone = mint(1); mint modinv(mint a) { return mintone / mint(a); } vector<mint> fact, inv_fact; void init_fact(int n) { fact.resize(n); fact[0] = mintone; for (int i = 1; i < n; i++) { fact[i] = fact[i - 1] * mint(i); } inv_fact.resize(n); inv_fact[n - 1] = modinv(fact[n - 1]); for (int i = n - 2; i >= 0; i--) { inv_fact[i] = mint(i + 1) * inv_fact[i + 1]; } } mint nCr(int n, int r) { if (n < r || n < 0 || r < 0) return mintzero; return fact[n] * inv_fact[r] * inv_fact[n - r]; } mint f(int h, int w, int k) { return mint(nCr(h + w, w)) - mint(nCr(h + w, w + k + 1)); } int main() { cin.tie(0); ios_base::sync_with_stdio(false); init_fact(4e5 + 6); LL N; cin >> N; mint ans = 0; mint pre = 0; FOR(i, 0, N / 2 + 1) { mint ret = f(N + i-1, i, N - 1); ans += ret; } cout << ans.get() << "\n"; return 0; }