a505.
B. T-primes
內容
We know that prime numbers are positive integers that have exactly two distinct positive divisors. Similarly, we'll call a positive integer t Т-prime, if t has exactly three distinct positive divisors.
You are given an array of n positive integers. For each of them determine whether it is Т-prime or not.
輸入說明
The first line contains a single positive integer, n (1 ≤ n ≤ 106), showing how many numbers are in the array. The next line contains nspace-separated integers xi (1 ≤ xi ≤ 1014).
輸出說明
Print n lines: the i-th line should contain "YES" (without the quotes), if number xi is Т-prime, and "NO" (without the quotes), if it isn't.
範例輸入
#1
3 4 5 6
範例輸出
#1
YES NO NO
測資資訊：
記憶體限制：
512
MB
提示 ：
n,xi範圍與原題不同！
測試資料較大！請使用較快的輸出入！
2012/10/11 加強測資！
標籤:
出處:
CodeForce230BT-primes
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