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TwoButtons.java
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60 lines (49 loc) · 1.24 KB
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import java.util.ArrayList;
import java.util.Scanner;
public class TwoButtons
{
public static void main( String[] args )
{
Scanner s = new Scanner( System.in );
int n = s.nextInt();
int m = s.nextInt();
int count=0;
if(m<=n)
count=(n-m);
else
{
while(n*2<m)
{
n=n*2;
count++;
}
if(m%2!=0)
{
int halfM =m/2+1;
int doubleN = 2*n;
if(n-halfM>doubleN-m)
{
count=count+(doubleN-m)+1;
}
else
{
count=count+(n-halfM)+2;
}
}
else
{
int halfM = m/2;
int doubleN = 2*n;
if(n-halfM>doubleN-m)
{
count=count+(doubleN-m)+1;
}
else
{
count=count+(n-halfM)+1;
}
}
}
System.out.println( count );
}
}