#include<stdio.h>int k;int dfs(int left){ if((left-k)<=1||((left-k)%2)==1) { return 1; } return dfs((left-k)>>1)+dfs(left-((left-k)>>1));}int main(){ int n; while(scanf("%d%d",&n,&k)!=EOF) { printf("%d\n",dfs(n)); }}