def suma_seg(f, n):
'''
>>> suma_seg([1, -2, 3, 4, 5, 6], 10)
(True, 4)
>>> suma_seg([1, 3, 1, -2, 0, 1], 12)
(False, -1)
>>> suma_seg([1, -1], 1)
(False, -1)
>>> suma_seg([-1, 1], 0)
(False, -1)
>>> suma_seg([1, -1], 0)
(True, 0)
>>> suma_seg([3],2)
(True, 0)
>>> suma_seg([],0)
(False, -1)
'''
suma = 0
for i in range(0, len(f)):
suma += f[i]
if suma > n:
return (True, i)
return (False, -1)
if __name__ == '__main__':
import doctest
print(doctest.testmod())