import java.util.*;

class Main {
	public static void main(String[] arg) {
		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int s= 0;
		
		if(B == 1) {
			System.out.println(0);
			return;
		}
		
		for(int i = 1;;i++){
			if((i*(A-1)) + 1 >= B){
				s = i;
				break;
			}
			
		}
		System.out.println(s);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz