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237 -Delete Node in a Linked ListWrite a function to delete a node (except the tail) in a singly linked list, given only access to that node.Supposed ... 阅读全文
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You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb... 阅读全文
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9 - Palindrome NumberDetermine whether an integer is a palindrome. Do this without extra space.Some hints:Could negative integers be palindromes? (ie,... 阅读全文