2270. Number of Ways to Split Array
Problem
2270. Number of Ways to Split Array
Approach
2 <= nums.length <= 10^5, so we can directly take the first element. The initial state has the pointer at index 0, about to move to index 1. A single for loop is all we need.
The second method is the key one — taken from the editorial.
Code
class Solution:
def waysToSplitArray(self, nums: List[int]) -> int:
temp_sum = nums[0]
total_sum = sum(nums) - temp_sum
ans = 0
for i in range(1, len(nums)):
if temp_sum >= total_sum:
ans += 1
temp_sum += nums[i]
total_sum -= nums[i]
return anst = (sum(nums) + 1) // 2
return sum(s >= t for s in accumulate(nums[:-1]))贡献者
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