結果
| 問題 | No.2074 Product is Square ? |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-06-30 17:48:42 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 645 ms / 2,000 ms |
| コード長 | 3,148 bytes |
| コンパイル時間 | 3,540 ms |
| コンパイル使用メモリ | 84,824 KB |
| 実行使用メモリ | 44,592 KB |
| 最終ジャッジ日時 | 2024-07-07 05:20:10 |
| 合計ジャッジ時間 | 13,136 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int t = sc.nextInt();
StringBuilder sb = new StringBuilder();
while (t-- > 0) {
ArrayDeque<Long> current = new ArrayDeque<>();
ArrayDeque<Long> next = new ArrayDeque<>();
int n = sc.nextInt();
while (n-- > 0) {
long a = sc.nextLong();
while (current.size() > 0) {
long x = current.poll();
long gcd = getGCD(a, x);
a /= gcd;
x /= gcd;
if (x > 1) {
next.add(x);
}
}
if (a > 1) {
next.add(a);
}
ArrayDeque<Long> tmp = current;
current = next;
next = tmp;
}
if (isSquare(current)) {
sb.append("Yes\n");
} else {
sb.append("No\n");
}
}
System.out.print(sb);
}
static boolean isSquare(ArrayDeque<Long> deq) {
while (deq.size() > 0) {
if (!isSquare(deq.poll())) {
return false;
}
}
return true;
}
static boolean isSquare(long x) {
long left = 0;
long right = Integer.MAX_VALUE;
while (right - left > 1) {
long m = (left + right) / 2;
if (m * m <= x) {
left = m;
} else {
right = m;
}
}
return left * left == x;
}
static long getGCD(long x, long y) {
if (y == 0) {
return x;
} else {
return getGCD(y, x % y);
}
}
}
class Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
tenten