题解 | #构建乘积数组#

import java.util.*;


public class Solution {
    /**
     * 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 A int整型一维数组 
     * @return int整型一维数组
     */
    public int[] multiply (int[] A) {
        // write code here
        int[] ret = new int[A.length];
        ret[0] = 1;
        int tmp = 1;
        for (int i = 0; i < A.length-1; i++){
            tmp *= A[i];
            ret[i+1] = tmp;
        }
        tmp = 1;
        for (int i = A.length-1; i > 0; i--){
            tmp *= A[i];
            ret[i-1] *= tmp;
        }

        return ret;
    }
}