题解 | #调整数组顺序使奇数位于偶数前面(一)#

class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param array int整型vector 
     * @return int整型vector
     */
    vector<int> reOrderArray(vector<int>& array) {
        int n = array.size();
        vector<int> res(n);
        int oddcnt = 0;
        for (int i=0; i<n; i++){
            if (array[i]%2!=0) oddcnt++;
        }
        int pt1 = 0, pt2 = oddcnt;
        for (int i=0; i<n; i++){
            if (array[i]%2!=0) {
                res[pt1] = array[i];
                pt1++;
            } else {
                res[pt2] = array[i];
                pt2++;
            }
        }
        return res;
    }
};