#include <stdio.h>
#include <math.h>

main(){
	int index1,index2;
	int number=1;
	int ans=0;
	long long cmp[2];
	char buf[100];

	fgets(buf,sizeof(buf),stdin);
	sscanf(buf,"%d %d",&index1,&index2);

	cmp[0]=pow(2,index1);
	cmp[1]=number*pow(2,index2);
	while(cmp[1]<=cmp[0]){
		number++;
		ans++;
	}

	printf("%x\n",ans);
	return(0);
}