HDU 1196 Lowest Bit

Lowest Bit

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6591    Accepted Submission(s): 4836

Problem Description

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

 

Author

SHI, Xiaohan

 

Source

Zhejiang University Local Contest 2005

 

Recommend

Ignatius.L

 

思路：位运算

 

代码：

#include <iostream>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cstdio>
using namespace std;
int n;
int lowbit(int x)
{
    return x & (- x);
}
int main()
{
    while(scanf("%d",&n),n != 0)
    {
        printf("%d\n",lowbit(n));
    }
    return 0;
}