Number of Ways to Split Array | Simple Thought Process | Leetcode 2270 | codestorywithMIK
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Hi Everyone, this is the 134th video of our Playlist "Arrays 1D/2D : Popular Interview Problems".
In this video we will solve a simple prefix Sum Based problem - Number of Ways to Split Array | Simple Thought Process | Leetcode 2270 | codestorywithMIK
Problem Name : Number of Ways to Split Array | Simple Thought Process | Leetcode 2270 | codestorywithMIK
Company Tags : will update later
My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Arrays/Cumulative_Sum(Prefix Array)/Number of Ways to Split Array.cpp
Leetcode Link : https://leetcode.com/problems/number-of-ways-to-split-array
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Video Summary :
Cumulative Sum Approach:
Precompute a cumulative sum array where each index stores the sum of elements up to that point. For each split index, calculate leftSum and rightSum using the cumulative sum array and check if leftSum is greater than or equal to rightSum. This approach has O(n) time complexity and O(n) space complexity due to the extra array.
Total Sum Approach:
Compute the total sum of the array and dynamically calculate leftSum during a single traversal, deriving rightSum as sum - leftSum. Check if leftSum is greater than or equal to rightSum for each split index. This approach is O(n) in time and O(1) in space, making it more efficient.
✨ Timelines✨
00:00 - Introduction
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