50. 数组剔除元素后的乘积两个遍历

vector<long long> productExcludeItself(vector<int> &nums) {
        vector<long long> res;
        for(int i=0;i<nums.size();i++)
        {
            long long mul1=1;
            long long mul2=1;
            for(int j=0;j<i;j++)
            {
                mul1*=nums[j];
            }
            for(int k=i+1;k<nums.size();k++)
            {
                mul2*=nums[k];
            }
            res.push_back(mul1*mul2);
        }
        return res;
        // write your code here
    }