結果

問題 No.1035 Color Box
ユーザー ningenMe
提出日時 2019-02-27 00:15:21
言語 C++11
(gcc 13.3.0)
結果
AC  
実行時間 18 ms / 2,000 ms
コード長 3,340 bytes
コンパイル時間 718 ms
コンパイル使用メモリ 86,088 KB
実行使用メモリ 5,632 KB
最終ジャッジ日時 2024-06-23 05:01:14
合計ジャッジ時間 2,225 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 36
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <fstream>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <algorithm>
#include <numeric>
#include <functional>
#include <string>
#include <vector>
#include <bitset>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>
using namespace std;
using ll = long long;
template<class T> using V = vector<T>;
template<class T, class U> using P = pair<T, U>;
#define REP(i,n) for(int i = 0; i < int(n); i++)
#define FOR(i, m, n) for(int i = int(m);i < int(n);i++)
#define ALL(obj) (obj).begin(),(obj).end()
const ll MOD = (ll)1e9 + 7;
const ll HINF = (ll)1e18;
const ll LINF = (ll)1e9;
const long double PI = 3.1415926535897932384626433;
template<class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl;exit(0);}else return;}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x
    .second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj
    .begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") <<
    obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
template <template <class tmp> class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj
    .end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b) { a = max<T>(a, b); }
template <class T> void chmin(T& a, const T b) { a = min<T>(a, b); }
void YN(bool flg) {cout << ((flg) ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << ((flg) ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << ((flg) ? "yes" : "no") << endl;}
//Combination Mod
class Combination_Mod {
public:
vector<long long> fac, finv, inv;
long long MOD;
Combination_Mod(int N, long long mod) : fac(vector<long long>(N + 1)), finv(vector<long long>(N + 1)), inv(vector<long long>(N + 1)), MOD(mod) {
fac[0] = fac[1] = finv[0] = finv[1] = inv[1] = 1;
for (int i = 2; i <= N; ++i) {
fac[i] = fac[i - 1] * i % MOD;
inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD;
finv[i] = finv[i - 1] * inv[i] % MOD;
}
}
long long num(int n, int k) {
return ((n < 0 || k < 0 || n < k) ? 0 : fac[n] * (finv[k] * finv[n - k] % MOD) % MOD);
}
};
//Pow_Mod O(log(n))
long long Pow_Mod(long long x, long long n, long long mod) {
long long res = 1;
for (; n > 0; n >>= 1, (x *= x) %= mod) if (n & 1) (res *= x) %= mod;
return res;
}
int main() {
ll N, M; cin >> N >> M;
Combination_Mod CM(M,MOD);
ll ans = 0,sgn = 1;
for(ll i = M; 1 <= i; --i){
(ans += (MOD + sgn*( (CM.num(M, i)*Pow_Mod(i, N, MOD)) % MOD ) )%MOD ) %= MOD;
sgn *= -1;
}
cout << ans << endl;
return 0;
}
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