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Data Structures for Coding Interviews

Solution: A Sublist with a Sum of 0

Explore how to detect if a contiguous sublist within a list sums to zero using a hash table to track cumulative sums. Understand the implementation and reasoning behind this efficient O(n) time and space complexity approach, aiding your problem-solving skills in coding interviews.

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Statement

Given a list containing both positive and negative integers, determine if there exists a sublist of consecutive elements whose elements sum to zero. Return TRUE if such a sublist exists; otherwise, return FALSE.

Constraints:

  • 1≤1 \leq lst.length ≤103\leq 10^{3}
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