Stock(with indexes)

num = raw_input("Enter Stock numbers: ").split(" ")
z=len(num)
def GMP(n):
    least=0
    profit=0
    index=0
    for i in range(z):
        profit += int(n[i])
        if least>profit:
                least=profit
                end=i
        else:
            if profit >= 0:
                profit=0
                index= i+1
    return least, index, end
print GMP(num)