hdu-oj 1390 Binary Numbers

Binary Numbers

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 2771    Accepted Submission(s): 1710

Problem Description

Given a positive integer n, find the positions of all 1's in its binary representation. The position of the least significant bit is 0.
Example
The positions of 1's in the binary representation of 13 are 0, 2, 3.
Task
Write a program which for each data set:
reads a positive integer n,
computes the positions of 1's in the binary representation of n,

writes the result.

 Input

The first line of the input contains exactly one positive integer d equal to the number of data sets, 1 <= d <= 10. The data sets follow.
Each data set consists of exactly one line containing exactly one integer n, 1 <= n <= 10^6.

 Output

The output should consists of exactly d lines, one line for each data set.
Line i, 1 <= i <= d, should contain increasing sequence of integers separated by single spaces - the positions of 1's in the binary representation of the i-th input number.

 Sample Input

113

 Sample Output

0 2 3
题目大意：将数据的2进制中1的位置输出（末尾记为0位置）
解题思路：将2进制1保存在数组中，方便记录位置。
注意：输出结果最后一位无空格。
附代码：
#include <stdio.h>#include <string.h>int a[1000000];int main(){  int n,m,i,j,k;   scanf("%d",&n);   while(n--){      scanf("%d",&m);      memset(a,0,sizeof(a));i=0;      while(m){        a[i++]=m%2;        m/=2;      }      for(j=0;j<=i;j++){         if(a[j]==1)          { printf("%d",j);         break;}           }      for(k=j+1;k<=i;k++){         if(a[k]==1)           printf(" %d",k);      }      printf("\n");   }    return 0;}