#lab 1.3

# combo toolkit allows easy coding combinations, found after spending hours trying to
# hard code if statements, this is way easier
from itertools import combinations

# itertools uses the combinations to iterate through and find matches ([index], choose 3)
input_int = list(combinations([1, 3, 6, 2, -1, 2, 8, -2, 9], 3))

# variables, and index for parsing through the input_int
triplets = []
ind = 0
length = len(input_int)

# for loop iterates through index, sum(input_int[ind]) == 0 stops when it finds a
# three integer combonation with a total sum of zero
for i in range(length):
    if sum(input_int[ind]) == 0:
        triplets.append(input_int[ind])
        ind += 1

print("The following triplets have sum zero: ", triplets)