Question

杭电acm2092我哪里错了 网址http://acm.hdu.edu.cn/showproblem.php?pid=2092

#include <stdio.h>
#include<math.h>
int main()
{
int a,b,r,x;
while((scanf("%d %d",&a,&b)!=EOF)&&(a!=0&&b!=0))
{
r=0;
x=a*a-4*b ;
if(x<0)
printf("NO\n");
else
{
x=(int)sqrt(x);
if(x*x==(a*a-4*b))
{
if((-a+x)%2==0&&(-a-x)%2==0);
else
r=1;
}
else
r=1;
if(r==0)
printf("YES\n");
else
printf("NO\n");
}
}
return 0;
}

Answer 1

你试一下1,0两个数