LC-1480 Easy LeetCode

1480. Running Sum of 1d Array

Read the full problem statement on LeetCode.

Difficulty: easy Acceptance: 87% Topics: Array, Prefix Sum

Reading material

Arrays & Hashing 12 min Prefix Sums & Difference Arrays 11 min

Reference solution (spoiler · python)

# Time:  O(n)
# Space: O(1)

class Solution(object):
    def runningSum(self, nums):
        """
        :type nums: List[int]
        :rtype: List[int]
        """
        for i in xrange(len(nums)-1):
            nums[i+1] += nums[i]
        return nums

Solution from kamyu104/LeetCode-Solutions · MIT