結果
問題 | No.573 a^2[i] = a[i] |
ユーザー |
|
提出日時 | 2019-08-02 18:12:09 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 15 ms / 2,000 ms |
コード長 | 3,279 bytes |
コンパイル時間 | 1,999 ms |
コンパイル使用メモリ | 197,788 KB |
最終ジャッジ日時 | 2025-01-07 10:33:59 |
ジャッジサーバーID (参考情報) |
judge5 / judge5 |
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ファイルパターン | 結果 |
---|---|
other | AC * 47 |
ソースコード
#include <bits/stdc++.h>#define LLI long long int#define FOR(v, a, b) for(LLI v = (a); v < (b); ++v)#define FORE(v, a, b) for(LLI v = (a); v <= (b); ++v)#define REP(v, n) FOR(v, 0, n)#define REPE(v, n) FORE(v, 0, n)#define REV(v, a, b) for(LLI v = (a); v >= (b); --v)#define ALL(x) (x).begin(), (x).end()#define RALL(x) (x).rbegin(), (x).rend()#define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it)#define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it)#define EXIST(c,x) ((c).find(x) != (c).end())#define fst first#define snd second#define popcount __builtin_popcount#define UNIQ(v) (v).erase(unique(ALL(v)), (v).end())#define bit(i) (1LL<<(i))#ifdef DEBUG#include <misc/C++/Debug.cpp>#else#define dump(...) ((void)0)#endif#define gcd __gcdusing namespace std;template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;}template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;}template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;}template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);}template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);}template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);}LLI power(LLI n, LLI p, LLI m){LLI ret = 1;while(p>0){if(p&1) (ret *= n) %= m;(n *= n) %= m;p /= 2;}return ret;}LLI mod_inv(LLI n, LLI p){return power(n,p-2,p);}/*** @attention 使用前にinit関数を呼び出す*/template <LLI MOD> class CombUtils{public:static vector<LLI> facto;static vector<LLI> ifacto;static void init(int N){facto.assign(N+1, 1);ifacto.assign(N+1, 1);FORE(i,1,N){(facto[i] = facto[i-1] * i) %= MOD;}ifacto[N] = mod_inv(facto[N],MOD);REV(i,N-1,0){ifacto[i] = ifacto[i+1] * (i+1) % MOD;}}static LLI factorial(LLI i){assert(i < facto.size());return facto[i];}static LLI factorial_inverse(LLI i){assert(i < ifacto.size());return ifacto[i];}static LLI P(LLI n, LLI k);static LLI C(LLI n, LLI k);static LLI H(LLI n, LLI k);static LLI stirling_number(LLI n, LLI k);static LLI bell_number(LLI n, LLI k);};template <LLI MOD> vector<LLI> CombUtils<MOD>::facto = vector<LLI>();template <LLI MOD> vector<LLI> CombUtils<MOD>::ifacto = vector<LLI>();template <LLI MOD> LLI CombUtils<MOD>::P(LLI n, LLI k){if(n < k or n < 0 or k < 0) return 0;return factorial(n) * factorial_inverse(n-k) % MOD;}template <LLI MOD> LLI CombUtils<MOD>::C(LLI n, LLI k){if(n < k or n < 0 or k < 0) return 0;return P(n,k) * factorial_inverse(k) % MOD;}template <LLI MOD> LLI CombUtils<MOD>::H(LLI n, LLI k){if(n == 0 and k == 0) return 1;return C(n+k-1, k);}const LLI mod = 1e9+7;int main(){cin.tie(0);ios::sync_with_stdio(false);CombUtils<mod>::init(200000);int N;while(cin >> N){LLI ans = 0;FORE(i,0,N){(ans += CombUtils<mod>::C(N,i) * power(i,N-i,mod) % mod) %= mod;}cout << ans << endl;}return 0;}