Types: n: int, i: int, j: int

Ranges: 1 ≤ n ≤ 60, 1 ≤ i ≤ 2^n, 1 ≤ j ≤ 2^n

Addtl Info: Input ends with "0 0 0". Each dataset consists of three integers. There can be at most 100 datasets.