Lowest Bit
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 9712 Accepted Submission(s): 7133
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.
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
题意:
给出一个十进制的数,让你输出,他的最后一个1出现的位置和后面的位数构成的二进制数的值,比如14 的二进制为 1110 那么就是 10,输出2...
理解题意之后就非常简单了,只需要当成转化为二进制的方法进行处理就可以了.....
比较简单,直接水过.....
#include<stdio.h>
int main()
{
int n;
while(scanf("%d",&n),n)
{
int kase=0,k=0,sum=1;
while(n%2==0)//末尾不为零,继续循环
{
sum<<=1;//然后加倍
n/=2;//继续求下一位
}
printf("%d\n",sum);//输出..
}
return 0;
}
2015年11月12日:
时至今日,突然见到之前的这个题了,最近看了写树状数组的知识点,发现这个题原来只要需有一条操作语句........
#include<stdio.h>
int main()
{
int n;
while(~scanf("%d",&n),n)
{
n=n&(-n);
printf("%d\n",n);
}
return 0;
}
学新东西的时候,以前做过的题也可能会有更好的方法去做了,这点倒是真的.....
继续努力吧!