#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int m,n,x,y; cin>>m>>n; for(x=1;x<=m;x++){ for(y=1;y*x<=n;y++){ if(x+y==m&&x*y==n){ cout<<"Yes"; return 0; } } } cout<<"No"; return 0; }