#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; cin >> m >> n; for (int i = 1; i <= m; i++) { for (int j = 1; j <= m; j++) { if (i + j == m && i * j == n) { cout << "YES" << endl; return 0; } } } cout << "NO" << endl; return 0; }