URAL1079

Problem E

Time Limit : 4000/2000ms (Java/Other)   Memory Limit : 32768/16384K (Java/Other)

Total Submission(s) : 15   Accepted Submission(s) : 7

Problem Description

Consider the sequence of numbers a_i, i = 0, 1, 2, …, which satisfies the following requirements:

• a₀ = 0
• a₁ = 1
• a_2i = a_i
• a_2i+1 = a_i + a_i+1

for every i = 1, 2, 3, … .

Write a program which for a given value of n finds the largest number among the numbers a₀, a₁, …, a_n.

 

Input

You are given several test cases (not more than 10). Each test case is a line containing an integer n (1 ≤ n ≤ 99 999).  The last line of input contains 0.

 

Output

For every n in the input write the corresponding maximum value found.

 

Sample Input

input	output
5 10 0	3 4

#include<stdio.h>
int main()
{
    int i,j,n,max;
    int a[200005];
    while(~scanf("%d",&n)&&n!=0)
    {
        max=0;
        a[0]=0;
           a[1]=1;
    for(i=1;i<=n;i++)
    {
       a[2*i]=a[i];
       a[2*i+1]=a[i]+a[i+1];
    }
     for(i=0;i<=n;i++)
       if(a[i]>=max)
           max=a[i];
     printf("%d\n",max);
    }
    return 0;
}