二叉树

//二叉树
#include<stdio.h>
int common(int x,int y)
{
	if(x==y)
	return x;
	if(x>y) common(x/2,y);
	else common(x,y/2);
}
int main()
{
	int m,n;
	scanf("%d%d",&m,&n);
	printf("%d\n",common(m,n));
	return 0;
}