1. How I sloved

    I made a variable named ‘sum’, add it with each element of ‘nums’ and returned the sum of each element and ‘sum’.

2. Code

class Solution:
    def runningSum(self, nums: List[int]) -> List[int]:
        sum = 0
        output_list = []

        for num in nums:
            sum += int(num)
            output_list.append(sum)
        return output_list

3. Result

        Runtime : 40 ms(74.06%), Memory usage : 13.9 MB(84.57%)
        (Runtime can be different by a system even if it is a same code.)

Check out the my GitHub repo for more info on the code. If you have questions, you can leave a reply on this post.