杭电2092

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int n,m,i,j,x;
 5     while(~scanf("%d%d",&n,&m)&&(n||m))
 6     {
 7         x=m<0?-m:m;
 8         for(i=1; i*i<=x; ++i)
 9         {
10             if(x%i)
11                 continue;
12             else
13                 j=m/i;
14             //printf("i-j=%d,j-i=%d\n",i-j,j-i);
15             if(m)
16             {
17                 if(i+j==n||-i-j==n)
18                     break;
19             }
20             else if(i-j==n||j-i==n)
21                 break;
22         }
23         if(i*i>x)
24             printf("No\n");
25         else
26             printf("Yes\n");
27     }
28 }