1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cmath>
 5 
 6 using namespace std;
 7 
 8 #define N 51
 9 #define INF 0x3f3f3f3f
10 
11 int main()
12 {
13     int n, m;
14 
15     while(scanf("%d%d", &n, &m), n+m)
16     {
17         //int flag = 0;
18 
19         double x = 1.0*(n+sqrt(n*n-4*m))/2;
20         double y = 1.0*(n-sqrt(n*n-4*m))/2;
21 
22         if(x == (int) x && y == (int)y)
23             printf("Yes\n");
24         else
25             printf("No\n");
26     }
27     return 0;
28 }