Print unique subarrays with expected sum.\n\n```\ninput: a ={1,1,2,5,6,7} and expectedSum=8\nexpected output: \n[1, 1, 6]\n[1, 2, 5]\n[1, 7]\n[2, 6]\n```\n\nI did the standard backtracking of calculating the sum and print. But it printed out duplicates of [1,2,5] and [1,7] as there are two 1s. For the uniqueness, I proposed having a Set of arrays probably. But he was looking for other options.\n\nHow can we improve the backtracking to print unique array?\n\n

Print unique subarrays with expected sum.\n\n\ninput: a ={1,1,2,5,6,7} and expectedSum=8\nexpected output: \n[1, 1, 6]\n[1, 2, 5]\n[1, 7]\n[2, 6]\n\n\nI did the