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In the "100 game," two players take turns adding, to a running total, any integer from 1..10. The player who first causes the running total to reach o 阅读全文
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From: http://www.geeksforgeeks.org/find-number-of-triangles-possible/ Given an unsorted array of positive integers. Find the number of triangles that 阅读全文
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Find the K closest points to a target point in a 2D plane. 阅读全文
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Path Sum I Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the g 阅读全文
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Given a complete binary tree, count the number of nodes. Definition of a complete binary tree from Wikipedia:In a complete binary tree every level, ex 阅读全文
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Given an array of integers, 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear twi 阅读全文
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Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] 阅读全文
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Given an integer, write a function to determine if it is a power of three. Follow up:Could you do it without using any loop / recursion? 阅读全文
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Determine whether an integer is a palindrome. Do this without extra space. 分析：把一个数倒过来，然后看两个数是否相同。 Reverse digits of an integer. Example1: x = 123, ret 阅读全文
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Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the 阅读全文