算法第四版1.1.14

package com.zzh;

import edu.princeton.cs.algs4.StdIn;
import edu.princeton.cs.algs4.StdOut;

public class Test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int n=StdIn.readInt();
        StdOut.println(lg(n));
    }
    public static int lg(int n) {
        int count=0;
        while(n/2>=1) {
            n/=2;
            count++;
        }
        return count;
        
    }
}