#include <iostream>
#include <limits.h>
using namespace std;
bool isPrime(int n)
{
if(n==1)
return false;
for(int i=2; i*i<=n; i++)
{
if(n % i == 0)
return false;
}
return true;
}
int main() {
int n = 65;
printf("%s", isPrime(n) ? "true" : "false");
return 0;
}
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