1427.cpp

另外一部分在nankai上面写的题目

#include <cstdio>
int main()
{
	int n,sum;
	while (scanf("%d",&n)==1)
	{
		if (n==1) {printf("1\n");continue;}
		sum=0;
		while (n>0)
		{
			n=n/2;
			sum++;
		}
		printf("%d\n",sum-1);
	}
    return 1;
}