[Lucky Algorithm] Lonely Integer (55/77)
Lonely Integer (Hacker Rank) Consider an array of integers, , where all but one of the integers occur in pairs. In other words, every element in occurs exa...
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[Lucky Algorithm] Marc’s Cakewalk (54/77)
Marc’s Cakewalk (Hacker Rank) Marc loves cupcakes, but he also likes to stay fit. He eats cupcakes in one sitting, and each cupcake has a calorie count, . ...
[Lucky Algorithm] Tree: Postorder Traversal (53/77)
Tree: Postorder Traversal (Hacker Rank) Complete the postOrder function in your editor below, which has 1 parameter: a pointer to the root of a binary tree. ...
[Lucky Algorithm] Correctness and the Loop Invariant (52/77)
Correctness and the Loop Invariant (Hacker Rank) In the previous challenge, you wrote code to perform an Insertion Sort on an unsorted array. But how would y...
[Lucky Algorithm] Ice Cream Parlor (51/77)
Ice Cream Parlor (Hacker Rank) Each time Sunny and Johnny take a trip to the Ice Cream Parlor, they pool together dollars for ice cream. On any given day, t...