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nums = [1, 2, 3][[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]nums = [0, 1][[0, 1], [1, 0]]nums = [1][[1]]Time Complexity
Space Complexity