Leetcode905.Sort Array By Parity按奇偶排序数组
给定一个非负整数数组 A,返回一个由 A 的所有偶数元素组成的数组,后面跟 A 的所有奇数元素。
你可以返回满足此条件的任何数组作为答案。
示例:
输入:[3,1,2,4] 输出:[2,4,3,1] 输出 [4,2,3,1],[2,4,1,3] 和 [4,2,1,3] 也会被接受。
提示:
- 1 <= A.length <= 5000
- 0 <= A[i] <= 5000
需要注意位运算的优先级,不加括号很可有结果不一样。最好加上括号
class Solution {
public:
vector<int> sortArrayByParity(vector<int>& A) {
int len = A.size();
int low = 0;
int high = len - 1;
while(low < high)
{
for(; low < high; low++)
{
if((A[low] & 1) == 1)
{
break;
}
}
for(; high > low; high--)
{
if((A[high] & 1) == 0)
{
break;
}
}
if(low < high)
{
swap(A[low], A[high]);
}
}
return A;
}
};
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