3 September 2026 · Advanced track

Shortest Balanced Stretch

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Find the shortest run of sensor readings that adds up exactly to a target value.

A conveyor belt sensor logs a small integer adjustment value every second. The value can be positive, negative, or zero. Find the length of the shortest contiguous stretch of readings that adds up to exactly a target amount. Return that length as an integer. If no stretch of readings adds up to the target, return -1.

Constraints

readings is a list of integers and can include negative numbers, positive numbers, or zero
readings can be empty
target is an integer
If readings is empty, or no contiguous stretch sums to target, return -1

Function signature

def shortest_balanced_stretch(readings, target):

Shortest Balanced Stretch

Constraints

Function signature

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