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from itertools import combinations
## arrInputList = [1, 2, 3, 6] ## Example 1
## arrInputList = [1, 1, 1, 3, 5] ## Example 2
arrInputList = [3, 3, 6, 4, 5] ## Example 2
def IsSpecialQuadruplets(arrInput):
n_a = arrInput[0]
n_b = arrInput[1]
n_c = arrInput[2]
n_d = arrInput[3]
return (arrInputList[n_a] + arrInputList[n_b] + arrInputList[n_c] == arrInputList[n_d])
arrIndxList = list(range(0, len(arrInputList)))
arrCombList = combinations(arrIndxList, 4)
arrOutputList = []
for loopComb in list(arrCombList):
if IsSpecialQuadruplets(loopComb):
arrOutputList.append(loopComb)
print (len(arrOutputList))
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