c++

class Solution {
public:
    vector<int> multiply(const vector<int>& A) {
        if (A.size() < 1) return A;
        vector<int> B(A.size(), 1);
        for (int i = 1; i < A.size(); ++ i) {
            B[i] = B[i-1]*A[i-1];
        }
        int tmp = 1;
        for (int i = A.size()-2; i >= 0; -- i) {
            tmp *= A[i+1];
            B[i] *= tmp;
        }
        return B;
    }
};