結果
問題 | No.573 a^2[i] = a[i] |
ユーザー |
|
提出日時 | 2020-02-27 01:24:50 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 25 ms / 2,000 ms |
コード長 | 3,089 bytes |
コンパイル時間 | 1,557 ms |
コンパイル使用メモリ | 170,700 KB |
実行使用メモリ | 18,840 KB |
最終ジャッジ日時 | 2024-10-13 15:39:16 |
合計ジャッジ時間 | 2,748 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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>using namespace std;#define REP(i,m,n) for(int i=(m); i<(int)(n); i++)#define RREP(i,m,n) for(int i=(int)(n-1); i>=m; i--)#define rep(i,n) REP(i,0,n)#define rrep(i,n) RREP(i,0,n)#define all(a) (a).begin(),(a).end()#define rall(a) (a).rbegin(),(a).rend()#define aut(r,v) __typeof(v) r = (v)#define each(it,o) for(aut(it,(o).begin()); it!=(o).end(); ++it)#define reach(it,o) for(aut(it,(o).rbegin()); it!=(o).rend(); ++it)#define fi first#define se second#define debug(...) {cerr<<"[L"<<__LINE__<<"] "; _debug(__VA_ARGS__);}template<typename T1, typename T2> ostream& operator<<(ostream& o, const pair<T1, T2>& p){return o<<"("<<p.first<<", "<<p.second<<")";}template<typename T>string join(const vector<T>&v, string del=", "){stringstream s;rep(i,v.size())s<<del<<v[i];return s.str().substr(del.size());}template<typename T>ostream& operator<<(ostream& o, const vector<T>&v){if(v.size())o<<"["<<join(v)<<"]";return o;}template<typename T>ostream& operator<<(ostream& o, const vector<vector<T> >&vv){int l=vv.size();if(l){o<<endl;rep(i,l){o<<(i==0?"[ ":",\n ")<<vv[i]<<(i==l-1?" ]":"");}}return o;}template<typename T>ostream& operator<<(ostream& o, const set<T>& st){vector<T> v(st.begin(),st.end());o<<"{ "<<join(v)<<" }";return o;}template<typename T1, typename T2>ostream& operator<<(ostream& o, const map<T1, T2>& m){each(p,m){o<<(p==m.begin()?"{ ":",\n ")<<*p<<(p==--m.end()?" }":"");}return o;}inline void _debug(){cerr<<endl;}template<class First, class... Rest>void _debug(const First& first, const Rest&... rest){cerr<<first<<" ";_debug(rest...);}typedef long long ll;typedef pair<int, int> pii;typedef vector<int> vi;typedef vector<vi> vvi;typedef vector<ll> vl;typedef vector<vl> vvl;const double PI = (1*acos(0.0));const double EPS = 1e-9;const ll INF = 0x3f3f3f3f;const ll INFL = 0x3f3f3f3f3f3f3f3fLL;const ll mod = 1e9 + 7;inline void finput(string filename) {freopen(filename.c_str(), "r", stdin);}ll mod_pow(ll x, ll n){ll v = 1;for(; n; x=x*x%mod, n>>=1)if(n & 1) v = v * x % mod;return v;}ll mod_inv(ll x){return mod_pow(x, mod-2);}struct Factorial{vector<ll> fact;vector<ll> factinv;Factorial(int n){fact = vector<ll>(n+1);factinv = vector<ll>(n+1);fact[0] = 1;REP(i,1,n+1) fact[i] = fact[i-1] * i % mod;factinv[n] = mod_inv(fact[n]);RREP(i,1,n+1) factinv[i-1] = factinv[i] * i % mod;}ll C(int n, int k){if(k<0 || k>n) return 0;return fact[n] * factinv[n-k] % mod * factinv[k] % mod;}ll P(int n, int k){if(k<0 || k>n) return 0;return fact[n] * factinv[n-k] % mod;}ll H(int n, int k){if(n==0 && k==0) return 1;return C(n+k-1, k);}};int main(){ios_base::sync_with_stdio(0);// finput("./input");int n; cin >> n;Factorial fa(n*10);ll ans = 0;REP(m,1,n+1){ans += fa.C(n,m) * mod_pow(m,n-m) % mod;ans %= mod;}cout << ans << endl;return 0;}