The Hamming distance between two integers is the number of positions at which the corresponding bits are different.
Given two integers x
and y
, calculate the Hamming distance.
Note:
0 ≤ x
, y
< 231.
Example:
Input: x = 1, y = 4 Output: 2 Explanation: 1 (0 0 0 1) 4 (0 1 0 0) ↑ ↑ The above arrows point to positions where the corresponding bits are different.
思路:
1.直接求出二进制,数不同位数的个数。
参考代码:
class Solution {
public:
int hammingDistance(int x, int y) {
int a[35],b[35],cnt=0;
memset(a,0,sizeof(a));
memset(b,0,sizeof(b));
for(int i=0;i<35&&x!=0;i++)
{
a[i]=x%2;
x/=2;
}
for(int i=0;i<35&&y!=0;i++)
{
b[i]=y%2;
y/=2;
}
for(int i=0;i<35;i++)
{
if(a[i]!=b[i])
cnt++;
}
return cnt;
}
};