inverse

# inverse


from collections import Counter
from itertools import repeat

def remove_opposite_pairs(seq):
    dplus = Counter(seq)
    dminus = Counter(-x for x in seq)
    for x,n in (dplus - dminus).items():
        yield from repeat(x, n)

lsts = [[326, -326, 336, -336, 336],
        [-35, 35, 838, -838, 440],
        [544, -544, 544],
        [-25, 25, 32, -32, -32, 56, 79],
        [-1, 0, 1, -1, -1]]

for l in lsts:
    print(list(remove_opposite_pairs(l)))