/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
        int n =71;
 
        int potega = 0;
        double wynik = 0;
        while (wynik <= n)
        {
 
            wynik = Math.pow(2, potega);
            potega ++;
            System.out.println(potega);
 
        }
    }
	}
 

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