#include<iostream> #include<math.h> using namespace std; int main(){ int a,b,c; c = 1; cin >> a >> b; c = pow(10,b-1); a = a - (a % c); if((a / c > 0 && a / c < 10)||(a == 0 && c == 1)){ cout << "Yes"; }else{ cout << "No"; } return 0; }