ZOJ Problem Set–2417 Lowest Bit

Time Limit: 2 Seconds      Memory Limit: 65536 KB

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Given an positive integer A (1 <= A <= 100), output the lowest bit of A.

For example, given A = 26, we can write A in binary form as 11010, so the lowest bit of A is 10, so the output should be 2.

Another example goes like this: given A = 88, we can write A in binary form as 1011000, so the lowest bit of A is 1000, so the output should be 8.

Input

Each line of input contains only an integer A (1 <= A <= 100). A line containing "0" indicates the end of input, and this line is not a part of the input data.

Output

For each A in the input, output a line containing only its lowest bit.

Sample Input

26
88
0

Sample Output

2
8

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Author: SHI, Xiaohan
Source: Zhejiang University Local Contest 2005

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
  int A;
  while(cin>>A && A)
  {
    int i = 0;
    while(A)
    {
      if(A&1 != 0)
      {
        cout<<pow(2.0, i)<<endl;
        break;
      }
      A >>= 1;
      i++;
    }
  }
}