Build a prefix sum array from [3, 1, 4, 1, 5]

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Problem

Build a prefix sum array from [3, 1, 4, 1, 5]. Start with [0] and append running totals. Print the prefix array. Then compute the range sum from index 1 to 3 using prefix[j+1] - prefix[i] and print it.

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