結果
| 問題 |
No.368 LCM of K-products
|
| コンテスト | |
| ユーザー |
koyopro
|
| 提出日時 | 2020-01-07 22:24:54 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 557 ms / 2,000 ms |
| コード長 | 3,642 bytes |
| コンパイル時間 | 2,506 ms |
| コンパイル使用メモリ | 172,400 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-11-23 01:15:47 |
| 合計ジャッジ時間 | 21,034 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 35 |
ソースコード
#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define array2(type, x, y) array<array<type, y>, x>
#define vector2(type) vector<vector<type> >
#define out(...) //printf(__VA_ARGS__)
int dxy[] = {0, 1, 0, -1, 0};
void solve();
signed main()
{
#if DEBUG
std::ifstream in("input.txt");
std::cin.rdbuf(in.rdbuf());
#endif
cin.tie(0);
ios::sync_with_stdio(false);
solve();
return 0;
}
/*================================*/
template<int MOD> struct ModInt {
static const int Mod = MOD; unsigned x; ModInt() : x(0) { }
ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
int get() const { return (int)x; }
ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; }
ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; }
ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; }
ModInt &operator/=(ModInt that) { return *this *= that.inverse(); }
ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }
ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }
ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }
ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0;
while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); }
return ModInt(u); }
bool operator==(ModInt that) const { return x == that.x; }
bool operator!=(ModInt that) const { return x != that.x; }
ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; }
};
template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; };
template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) {
ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; }
typedef ModInt<1000000007> mint;
int N,K;
vector<int> primes;
int A[1000];
void solve() {
cin>>N>>K;
REP(i,N)cin>>A[i];
primes.push_back(2);
for(int i=3; i<1e5; i+=2) {
int is_prime = true;
for (int p : primes) {
if (i%p==0) {
is_prime = false;
break;
}
}
if (is_prime) primes.push_back(i);
}
// primes.size => 9592
map<int, vector<int>> M;
REP(i,N) {
int a = A[i];
out("%lld:\n", a);
for (int p : primes) {
if (p > a) break;
int k=0;
while(a%p==0) {
k++;
a/=p;
}
if (k) {
out(" %lld ^ %lld = %lld\n", p, k, (int)pow(p,k));
M[p].push_back(k);
}
}
if (a > 1) {
out(" %lld ^ %d = %lld\n", a, 1, a);
M[a].push_back(1);
}
}
mint ans = mint(1);
for (auto p : M) {
auto vec = p.second;
sort(ALL(vec), greater<int>());
REP(i,min(K,(int)vec.size())) {
ans *= mint(p.first) ^ vec[i];
}
}
cout << ans << endl;
}
koyopro