python
from itertools import combinations def idx_sum(lst,num): com= list(combinations(lst,2)) # [(1, 5), (1, 2), (1, 4), (1, 6), (5, 2), (5, 4), (5, 6), (2, 4), (2, 6), (4, 6)] ans = [x for x in com if sum(x)==num] # [(1, 5), (2, 4)] return [(lst.index(x),lst.index(y)) for x,y in ans] # [(0, 1), (2, 3)] print(idx_sum([1,5,2,4,6],6)) #[(0, 1), (2, 3)]
# defines result of the code
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python
# defines result of the code