結果
問題 | No.1181 Product Sum for All Subsets |
ユーザー | rokahikou1 |
提出日時 | 2020-08-28 03:48:05 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 42 ms / 2,000 ms |
コード長 | 3,813 bytes |
コンパイル時間 | 1,679 ms |
コンパイル使用メモリ | 169,952 KB |
実行使用メモリ | 8,064 KB |
最終ジャッジ日時 | 2024-11-09 00:59:15 |
合計ジャッジ時間 | 3,385 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 | 9 ms
8,064 KB |
testcase_01 | AC | 9 ms
7,936 KB |
testcase_02 | AC | 9 ms
7,936 KB |
testcase_03 | AC | 8 ms
8,064 KB |
testcase_04 | AC | 8 ms
7,936 KB |
testcase_05 | AC | 8 ms
7,936 KB |
testcase_06 | AC | 8 ms
7,936 KB |
testcase_07 | AC | 9 ms
7,936 KB |
testcase_08 | AC | 9 ms
7,936 KB |
testcase_09 | AC | 9 ms
8,064 KB |
testcase_10 | AC | 9 ms
7,936 KB |
testcase_11 | AC | 9 ms
7,936 KB |
testcase_12 | AC | 36 ms
7,936 KB |
testcase_13 | AC | 14 ms
7,936 KB |
testcase_14 | AC | 35 ms
8,064 KB |
testcase_15 | AC | 29 ms
7,936 KB |
testcase_16 | AC | 37 ms
7,936 KB |
testcase_17 | AC | 20 ms
7,936 KB |
testcase_18 | AC | 34 ms
7,936 KB |
testcase_19 | AC | 32 ms
7,936 KB |
testcase_20 | AC | 37 ms
7,936 KB |
testcase_21 | AC | 23 ms
7,936 KB |
testcase_22 | AC | 17 ms
7,936 KB |
testcase_23 | AC | 12 ms
8,064 KB |
testcase_24 | AC | 16 ms
7,936 KB |
testcase_25 | AC | 23 ms
7,936 KB |
testcase_26 | AC | 10 ms
7,936 KB |
testcase_27 | AC | 8 ms
7,936 KB |
testcase_28 | AC | 42 ms
7,936 KB |
testcase_29 | AC | 42 ms
7,936 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(int(i) = 0; (i) < (n); (i)++) #define FOR(i, m, n) for(int(i) = (m); (i) < (n); (i)++) #define All(v) (v).begin(), (v).end() #define pb push_back #define MP(a, b) make_pair((a), (b)) template <class T> vector<T> make_vec(size_t a, T val) { return vector<T>(a, val); } template <class T, class... Ts> auto make_vec(size_t a, Ts... ts) { return vector<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...)); } using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using Graph = vector<vector<int>>; template <typename T> struct edge { int to; T cost; edge(int t, T c) : to(t), cost(c) {} }; template <typename T> using WGraph = vector<vector<edge<T>>>; const int INF = 1 << 30; const ll LINF = 1LL << 60; const int MOD = 1e9 + 7; template <uint_fast64_t MOD> class ModInt { using u64 = uint_fast64_t; public: u64 val; ModInt(const u64 x = 0) : val((x + MOD) % MOD) {} constexpr u64 &value() { return val; } constexpr ModInt operator-() { return val ? MOD - val : 0; } constexpr ModInt operator+(const ModInt &rhs) const { return ModInt(*this) += rhs; } constexpr ModInt operator-(const ModInt &rhs) const { return ModInt(*this) -= rhs; } constexpr ModInt operator*(const ModInt &rhs) const { return ModInt(*this) *= rhs; } constexpr ModInt operator/(const ModInt &rhs) const { return ModInt(*this) /= rhs; } constexpr ModInt &operator+=(const ModInt &rhs) { val += rhs.val; if(val >= MOD) { val -= MOD; } return *this; } constexpr ModInt &operator-=(const ModInt &rhs) { if(val < rhs.val) { val += MOD; } val -= rhs.val; return *this; } constexpr ModInt &operator*=(const ModInt &rhs) { val = val * rhs.val % MOD; return *this; } constexpr ModInt &operator/=(const ModInt &rhs) { *this *= rhs.inv(); return *this; } constexpr bool operator==(const ModInt &rhs) { return this->val == rhs.val; } constexpr bool operator!=(const ModInt &rhs) { return this->val != rhs.val; } friend constexpr ostream &operator<<(ostream &os, const ModInt<MOD> &x) { return os << x.val; } friend constexpr istream &operator>>(istream &is, ModInt<MOD> &x) { return is >> x.val; } constexpr ModInt inv() const { return ModInt(*this).pow(MOD - 2); } constexpr ModInt pow(ll e) const { u64 x = 1, p = val; while(e > 0) { if(e % 2 == 0) { p = (p * p) % MOD; e /= 2; } else { x = (x * p) % MOD; e--; } } return ModInt(x); } }; using mint = ModInt<MOD>; //二項係数(nCk mod.p;1<=k<=n<=1e7,pは素数)for ModInt template <class T> struct BiCoefficient { vector<T> fac, finv, inv; BiCoefficient(const int MAX) : fac(MAX), finv(MAX), inv(MAX) { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for(int i = 2; i < MAX; i++) { fac[i] = fac[i - 1] * i; inv[i] = -inv[MOD % i] * (MOD / i); finv[i] = finv[i - 1] * inv[i]; } } T comb(int n, int k) { if(n < k) return 0; if(n < 0 || k < 0) return 0; return fac[n] * finv[k] * finv[n - k]; } }; int main() { ll N, K; cin >> N >> K; mint Ksum = mint(K) * mint(K + 1) / mint(2); mint res = 0; BiCoefficient<mint> bicoef(201000); for(int i = 0; i < N; i++) { res += bicoef.comb(N, i) * mint(K).pow(N - i) * Ksum.pow(i); } cout << res << endl; }