Zero sum interval X29941

Statement

Dessign the function @intervalo_suma_cero(f, i)@ that, given a list $f$ of integers and an integer $i$ such that $0 \le i < len(f)$ , returns the smallest value $j \ge i$ such that the sum of the elements in $f$ from position $i$ to position $j$ is zero. If there is no such value, it will return -1.

Sample session

>>> intervalo_suma_cero([1,2,3,-5,-3,2,8,-8],0)
5
>>> intervalo_suma_cero([1,2,3,-5,-3,2,8,-8],1)
3
>>> intervalo_suma_cero([1,2,3,-5,-3,2,8,-8],5)
-1

Information

Author: InfBesos
Language: English
Other languages: Catalan Spanish
Official solutions: Python
User solutions: Python