OJ Board

helloneo wrote:

Code: Select all

1
0 0 9 9
2 0 9 9
2
1 0 9 9
9 0 9 9

my answer is 4 in this case. Is it right?

#include <iostream>
bool isprime(int n){
if(n == 0 || n == 1) return true;
for(int i=2; i<n/2; i++){
if(n % i == 0)
return false;
}
return true;
}


BTW: are you sure you want isprime() to work this way? According to it 0 and 1 are prime, so is 4. I don't think you'll get AC with that.

you ...

I compiled with g++ 4.0 in linux. it's no problem.
but acm show this error message:
04482233_24.c:6: parse error before `)'
04482233_24.c:6: parse error before `&'

I used isupper() that I defined at another problem. It got AC. why this time it cause matter?

This go well on my machine, but I got CE. Why?