题目描述

题目中等，注意输出格式即可。

样例

#include <iostream>
#include <algorithm>

using namespace std;

bool is_prime(int x)
{
    if (x < 2) return false;
    for (int i = 2; i <= x / i; i ++ )
        if (x % i == 0)
            return false;
    return true;
}

int main()
{
    int n;
    cin >> n;

    while (n -- )
    {
        int x;
        cin >> x;
        if (is_prime(x)) cout << x << " is prime\n";
        else cout << x << " is not prime\n";
    }

    return 0;
}