UVA 10110 - Light, more light
Problem PDF
Solution:
#include
#include
int main()
{
long long n,a,b;
while(scanf("%lld",&n)==1)
{
if(n==0)
break;
a=sqrt(n);
b=a*a;
if(b==n)
printf("yes\n");
else
printf("no\n");
}
return(0);
}