2.4 - Partition
Write code to partition a linked list around a value x, such that all nodes less than x come before all nodes greater than or equal to x. If x is contained within the list, the values of x only need to be after the elements less than x. The partition element x can appear anywhere in the "right partition"; it does not need to appear between the left and right partitions. EXAMPLE Input: 3 -> 5 -> 8 -> 5 -> 10 -> 2 -> 1 [partition = 5] Output: 3 -> 1 -> 2 -> 10 -> 5 -> 5 -> 8
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