题解 | #构建乘积数组#

#include <vector>
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 A int整型vector 
     * @return int整型vector
     */
    vector<int> multiply(vector<int>& A) {
        // write code here
        int n = A.size();
        vector<int> B(n,1);
        for(int i = 1;i<n;i++)
        {
          B[i]  = B[i-1]* A[i-1];
        }
        int tem = 1;
        for(int i = n-1;i>=0;i--)
        {
          B[i] = B[i] * tem;
          tem *= A[i];
        }
        return B;
    }
};