Chef and Interactive XOR

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**This is an interactive problem.** Chef and Cheffa are playing a game. Chef has a sequence of positive integers $a_1, a_2, \dots, a_N$; Cheffa should find the values of all elements of this sequence. Cheffa may ask Chef at most $N$ questions. In each question, Cheffa tells Chef 3 distinct indices $i$, $j$ and $k$, and Chef responds with an integer $a_i \oplus a_j \oplus a_k$ ($\oplus$ denotes

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solution.cppC++17

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