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You are given an array of integers representing identifiers (such as product codes or labels) in a linear sequence. Your task is to rearrange these identifiers so that no two identical values appear next to each other in the resulting array.
The goal is to reorganize the elements such that for every pair of adjacent positions i and i+1 in the output, the values at those positions must be different. You may return any valid arrangement that satisfies this constraint.
It is guaranteed that a valid rearrangement always exists for the given input.
The ordering of elements in your solution is flexible—as long as no two consecutive elements share the same value, your answer is considered correct. The problem tests your ability to strategically distribute repeated values across the array to prevent clustering of identical elements.
elements = [1,1,1,2,2,2][1,2,1,2,1,2]After rearrangement, each pair of adjacent elements has different values: 1≠2, 2≠1, 1≠2, 2≠1, 1≠2. The values 1 and 2 are interleaved perfectly since they have equal frequencies (3 each).
elements = [1,1,1,1,2,2,3,3][1,2,1,3,1,2,1,3]The most frequent element (1, appearing 4 times) is distributed across even indices, while 2 and 3 (each appearing twice) fill the remaining odd positions. No two adjacent elements are the same.
elements = [1,2,3][1,2,3]Since all elements are already distinct, the original order satisfies the constraint trivially. No rearrangement is necessary.
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