Zero sum interval X29941
Dessign the function intervalo_suma_cero(f, i) that, given a list f of integers and an integer i such that 0 ≤ i < len(f), returns the smallest value j ≥ 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