The solutions return a ^ b ? c : a return a == b ? a : c Are expressing exactly the same idea- When A and B are identical, they will xor to 0, and ot

The solutions return a ^ b ? c : a return a == b ? a : c Are expressing exactly the same idea- When A and B are identical, they will xor to 0, and otherwise something nonzero. Thus, xor can be thought of in general as a "!=" operator, provided booleans work like you'd expect in C.