結果
| 問題 |
No.368 LCM of K-products
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-01-02 20:50:17 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 364 ms / 2,000 ms |
| コード長 | 4,060 bytes |
| コンパイル時間 | 3,325 ms |
| コンパイル使用メモリ | 207,712 KB |
| 最終ジャッジ日時 | 2025-01-08 15:31:29 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 35 |
コンパイルメッセージ
main.cpp: In function ‘int main(int, char**)’:
main.cpp:95:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
95 | if (strchr(argv[1], 'i')) freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:96:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
96 | if (strchr(argv[1], 'o')) freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
#define endl '\n'
#define int long long
#define lint long long
#define pii pair<int, int>
#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define FORR(i, a, b) for(int i = (a); i > (b); --i)
#define REP(i, n) FOR(i, 0, n)
#define SZ(v) ((int)v.size())
#define ZERO(a) memset(a, 0, sizeof(a))
#define MINUS(a) memset(a, 0xff, sizeof(a))
#define FILLINF(a) memset(a, 0x3f, sizeof(a))
#define POW(n) (1LL << (n))
#define POPCNT(n) (__builtin_popcount(n))
#define IN(i, a, b) ((a) <= (i) && (i) <= (b))
using namespace std;
template <typename T> inline bool CHMIN(T& a,T b) { if(a > b) { a = b; return 1; } return 0; }
template <typename T> inline bool CHMAX(T& a,T b) { if(a < b) { a = b; return 1; } return 0; }
template <typename T> inline void SORT(T& a) { sort(begin(a), end(a)); }
template <typename T> inline void REV(T& a) { reverse(begin(a), end(a)); }
template <typename T> inline void UNI(T& a) { sort(a.begin(), a.end()); a.erase(unique(a.begin(), a.end()), a.end()); }
template <typename S, typename T> inline T LB(S& v, T a) { return *lower_bound(begin(v), end(v), a); }
template <typename S, typename T> inline int LBP(S& v, T a) { return lower_bound(begin(v), end(v), a) - begin(v); }
template <typename S, typename T> inline T UB(S& v, T a) { return *upper_bound(begin(v), end(v), a); }
template <typename S, typename T> inline int UBP(S& v, T a) { return upper_bound(begin(v), end(v), a) - begin(v); }
template <typename S, typename T> ostream& operator << (ostream& os, const pair<S, T>& p) { os << p.first << " " << p.second; return os; }
template <typename S, typename T> istream& operator >> (istream& is, pair<S, T>& p) { is >> p.first >> p.second; return is; }
template <typename T> ostream& operator << (ostream& os, const vector<T>& v) { for (int i = 0; i < v.size(); ++i) { if (i) os << " "; os << v[i]; } return os; }
template <typename T> istream& operator >> (istream& is, vector<T>& v) { for(T& in : v) is >> in; return is; }
template <typename T = int> vector<T> make_v(size_t a) { return vector<T>(a); }
template <typename T, typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...)); }
template <typename T, typename V> typename enable_if<is_class<T>::value == 0>::type fill_v(T &t, const V &v) { t = v; }
template <typename T, typename V> typename enable_if<is_class<T>::value != 0>::type fill_v(T &t, const V &v) { for(auto &e : t) fill_v(e, v); }
const double PI = 3.14159265358979323846;
const double EPS = 1e-10;
const lint INF = 0x3f3f3f3f3f3f3f3f;
const lint MOD = 1000000007;
// prime factor
// O(√n) time
vector<pair<int, int>> prime_factor(int n) {
vector<pair<int, int>> res;
for (int i = 2; i * i <= n; i++) {
int cnt = 0;
while (n % i == 0) {
n /= i;
cnt++;
}
if (cnt) res.emplace_back(i, cnt);
}
if (n != 1) res.emplace_back(n, 1);
return res;
}
// O(log n) time
long long mod_pow(long long a, long long n, long long m) {
a %= m;
if (a < 0) a += m;
long long res = 1;
while (n > 0) {
if (n & 1) res = res * a % m;
a = a * a % m;
n >>= 1;
}
return res;
}
int N, K;
int a[1010];
map<int, vector<int>> mp;
void _main() {
cin >> N >> K;
REP (i, N) {
cin >> a[i];
for (auto p : prime_factor(a[i])) {
mp[p.first].push_back(p.second);
}
}
int ans = 1;
for (auto&& p : mp) {
SORT(p.second);
REV(p.second);
int sum = 0;
for (int i = 0; i < K && i < SZ(p.second); ++i) {
sum += p.second[i];
}
(ans *= mod_pow(p.first, sum, MOD)) %= MOD;
}
cout << ans << endl;
}
signed main(signed argc, char **argv) {
if (argc > 1) {
if (strchr(argv[1], 'i')) freopen("input.txt", "r", stdin);
if (strchr(argv[1], 'o')) freopen("output.txt", "w", stdout);
}
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << fixed << setprecision(10);
_main();
return 0;
}