結果
| 問題 |
No.2074 Product is Square ?
|
| コンテスト | |
| ユーザー |
Nachia
|
| 提出日時 | 2022-09-16 22:27:02 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 437 ms / 2,000 ms |
| コード長 | 2,946 bytes |
| コンパイル時間 | 2,991 ms |
| コンパイル使用メモリ | 116,580 KB |
| 最終ジャッジ日時 | 2025-02-07 10:02:43 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 33 |
ソースコード
#line 1 "Main.cpp"
#line 2 "nachia\\math\\floor-of-kth-root.hpp"
#include <cassert>
namespace nachia{
namespace internal{
// mod 2^64
constexpr unsigned long long PowerOfULongLong(unsigned long long a, unsigned long long i){
unsigned long long res = 1;
while(i){ if(i&1){ res *= a; } i /= 2; a *= a; }
return res;
}
}
unsigned long long FloorOfKthRoot(unsigned long long real, unsigned long long k){
using u64 = unsigned long long;
assert(k != 0);
if(real <= 1) return real;
if(k >= 64) return 1;
if(k == 1) return real;
struct Precalc{
// a^i <= x
static constexpr bool lesseq(u64 a, int i, u64 x) {
if (a == 0) return true;
for(int j=0; j<i; j++) x /= a;
return x >= 1;
}
unsigned long long BORDER[64];
constexpr Precalc() : BORDER() {
for (int idx = 2; idx <= 63; idx++) {
u64 l = 0, r = 1ull << 33;
while (l + 1 < r) {
u64 m = (l + r) / 2;
if (lesseq(m, idx, ~0ull)) l = m;
else r = m;
}
BORDER[idx] = r;
}
};
};
constexpr Precalc precalc;
u64 l = 0, r = precalc.BORDER[k];
while (l + 1 < r) {
u64 m = (l + r) / 2;
if(internal::PowerOfULongLong(m, k) <= real) l = m;
else r = m;
}
return l;
}
unsigned long long CeilOfKthRoot(unsigned long long real, unsigned long long k){
if(real <= 1) return real;
if(k >= 64) return 2;
if(k == 1) return real;
unsigned long long x = FloorOfKthRoot(real, k);
if(internal::PowerOfULongLong(x, k) != real) x++;
return x;
}
} // namespace nachia
#line 3 "Main.cpp"
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <atcoder/modint>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
using Modint = atcoder::static_modint<998244353>;
u64 GCD(u64 a, u64 b){
while(b){
u64 c = a % b;
a = b;
b = c;
}
return a;
}
int main(){
int T; cin >> T;
rep(t,T){
int N; cin >> N;
vector<u64> A;
rep(i,N){
u64 a; cin >> a;
for(u64& j : A){
u64 g = GCD(j, a);
if(g != 1){ a /= g; j /= g; }
}
if(a != 1) A.push_back(a);
rep(j,A.size()) if(A[j] == 1){ swap(A[j], A.back()); A.pop_back(); j--; }
}
bool ok = true;
for(u64 j : A) if(nachia::FloorOfKthRoot(j,2) * nachia::FloorOfKthRoot(j,2) != j) ok = false;
cout << (ok ? "Yes" : "No") << '\n';
}
return 0;
}
struct ios_do_not_sync{
ios_do_not_sync(){
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
}
} ios_do_not_sync_instance;
Nachia