Technical Screen

Recursive Arithmetic with Invalid Intermediate Results

Jane StreetSoftware Engineer · Intern · Technical Screen · Aug 2026

An algorithms/LeetCode-oriented question. Problem description: Given a string expression, evaluate it and output the arithmetic result. Restrictions and constraints: Only positive integers are supported. Intermediate-state validation: At any stage of the calculation, if a negative number appears (for example, an intermediate result below 0) or a non-integer appears (for example, division that pro…

Shared by a candidate · reported Aug 2026. Interview formats change; use it as a guide, not a script.