結果
問題 | No.1785 Inequality Signs |
ユーザー | ゆにぽけ |
提出日時 | 2023-11-11 15:16:45 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 78 ms / 2,000 ms |
コード長 | 3,728 bytes |
コンパイル時間 | 1,671 ms |
コンパイル使用メモリ | 131,988 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-26 02:44:45 |
合計ジャッジ時間 | 4,570 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 2 ms
5,248 KB |
testcase_01 | AC | 10 ms
5,248 KB |
testcase_02 | AC | 58 ms
5,376 KB |
testcase_03 | AC | 62 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 31 ms
5,376 KB |
testcase_06 | AC | 66 ms
5,376 KB |
testcase_07 | AC | 4 ms
5,376 KB |
testcase_08 | AC | 56 ms
5,376 KB |
testcase_09 | AC | 13 ms
5,376 KB |
testcase_10 | AC | 43 ms
5,376 KB |
testcase_11 | AC | 14 ms
5,376 KB |
testcase_12 | AC | 23 ms
5,376 KB |
testcase_13 | AC | 13 ms
5,376 KB |
testcase_14 | AC | 36 ms
5,376 KB |
testcase_15 | AC | 27 ms
5,376 KB |
testcase_16 | AC | 22 ms
5,376 KB |
testcase_17 | AC | 41 ms
5,376 KB |
testcase_18 | AC | 44 ms
5,376 KB |
testcase_19 | AC | 38 ms
5,376 KB |
testcase_20 | AC | 38 ms
5,376 KB |
testcase_21 | AC | 37 ms
5,376 KB |
testcase_22 | AC | 13 ms
5,376 KB |
testcase_23 | AC | 21 ms
5,376 KB |
testcase_24 | AC | 78 ms
5,376 KB |
testcase_25 | AC | 30 ms
5,376 KB |
testcase_26 | AC | 27 ms
5,376 KB |
testcase_27 | AC | 50 ms
5,376 KB |
testcase_28 | AC | 50 ms
5,376 KB |
testcase_29 | AC | 49 ms
5,376 KB |
testcase_30 | AC | 50 ms
5,376 KB |
testcase_31 | AC | 49 ms
5,376 KB |
testcase_32 | AC | 49 ms
5,376 KB |
testcase_33 | AC | 2 ms
5,376 KB |
testcase_34 | AC | 3 ms
5,376 KB |
testcase_35 | AC | 4 ms
5,376 KB |
testcase_36 | AC | 27 ms
5,376 KB |
testcase_37 | AC | 9 ms
5,376 KB |
testcase_38 | AC | 9 ms
5,376 KB |
testcase_39 | AC | 7 ms
5,376 KB |
testcase_40 | AC | 10 ms
5,376 KB |
testcase_41 | AC | 13 ms
5,376 KB |
testcase_42 | AC | 29 ms
5,376 KB |
testcase_43 | AC | 45 ms
5,376 KB |
testcase_44 | AC | 36 ms
5,376 KB |
testcase_45 | AC | 6 ms
5,376 KB |
testcase_46 | AC | 9 ms
5,376 KB |
testcase_47 | AC | 7 ms
5,376 KB |
testcase_48 | AC | 14 ms
5,376 KB |
testcase_49 | AC | 2 ms
5,376 KB |
testcase_50 | AC | 36 ms
5,376 KB |
testcase_51 | AC | 5 ms
5,376 KB |
testcase_52 | AC | 4 ms
5,376 KB |
testcase_53 | AC | 6 ms
5,376 KB |
ソースコード
#include<iostream> #include<vector> #include<algorithm> #include<cstring> #include<cassert> #include<cmath> #include<ctime> #include<iomanip> #include<numeric> #include<stack> #include<queue> #include<map> #include<unordered_map> #include<set> #include<unordered_set> #include<bitset> #include<random> #include<functional> #include<utility> using namespace std; template<int m> struct modint { private: unsigned int value; static constexpr int mod() {return m;} public: constexpr modint(const long long x = 0) noexcept { long long y = x; if(y < 0 || y >= mod()) { y %= mod(); if(y < 0) y += mod(); } value = (unsigned int)y; } constexpr unsigned int val() noexcept {return value;} constexpr modint &operator+=(const modint &other) noexcept { value += other.value; if(value >= mod()) value -= mod(); return *this; } constexpr modint &operator-=(const modint &other) noexcept { unsigned int x = value; if(x < other.value) x += mod(); x -= other.value; value = x; return *this; } constexpr modint &operator*=(const modint &other) noexcept { unsigned long long x = value; x *= other.value; value = (unsigned int) (x % mod()); return *this; } constexpr modint &operator/=(const modint &other) noexcept { return *this *= other.inverse(); } constexpr modint inverse() const noexcept { assert(value); long long a = value,b = mod(),x = 1,y = 0; while(b) { long long q = a/b; a -= q*b; swap(a,b); x -= q*y; swap(x,y); } return modint(x); } constexpr modint power(long long N) const noexcept { assert(N >= 0); modint p = *this,ret = 1; while(N) { if(N & 1) ret *= p; p *= p; N >>= 1; } return ret; } constexpr modint operator+() {return *this;} constexpr modint operator-() {return modint() - *this;} constexpr modint &operator++(int) noexcept {return *this += 1;} constexpr modint &operator--(int) noexcept {return *this -= 1;} friend modint operator+(const modint& lhs, const modint& rhs) {return modint(lhs) += rhs;} friend modint operator-(const modint& lhs, const modint& rhs) {return modint(lhs) -= rhs;} friend modint operator*(const modint& lhs, const modint& rhs) {return modint(lhs) *= rhs;} friend modint operator/(const modint& lhs, const modint& rhs) {return modint(lhs) /= rhs;} friend ostream &operator<<(ostream &os,const modint &x) {return os << x.value;} }; //using mint = modint<998244353>; using mint = modint<1000000007>; template<class S> struct combination { vector<S> f,invf; combination(int N = 0) : f(1,1),invf(1,1) { update(N); } void update(int N) { if((int)f.size() > N) return; int pi = (int)f.size(); N = max(N,pi*2); f.resize(N+1),invf.resize(N+1); for(int i = pi;i <= N;i++) f[i] = f[i-1]*i; invf[N] = S(1)/f[N]; for(int i = N-1;i >= pi;i--) invf[i] = invf[i+1]*(i+1); } S factorial(int N) { update(N); return f[N]; } S invfactorial(int N) { update(N); return invf[N]; } S P(int N,int K) { assert(0 <= K && K <= N); update(N); return f[N]*invf[N-K]; } S C(int N,int K) { assert(0 <= K && K <= N); update(N); return f[N]*invf[K]*invf[N-K]; } S H(int N,int K) { if(!N) return K == 0 ? 1:0; return C(N+K-1,K); } }; combination<mint> C; int N,K; void solve() { cin >> N >> K; mint ans = 0; int M = max(0,N-K); mint binom = 1; { mint tmp = 1; for(int i = 1;i <= N;i++) binom *= (K+M-i+1),tmp *= i; binom /= tmp; } for(int i = M;i < N;i++) { mint cur = C.C(N-1,i) * binom; ans += cur; //(K+i,N) = (K+i)! / N! (K+i-N)! binom *= K+i+1; binom /= K+i-N+1; } cout << ans << endl; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int tt = 1; /* cin >> tt; */ while(tt--) solve(); }