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Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree [3 阅读全文
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Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Example 1: Input: n = 12 O 阅读全文
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You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1' 阅读全文
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Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be ch 阅读全文
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此bootloader是根据韦东山先生的开发板而制定的 是一个最小的boot系统 必须首先把内核拷nandflash里面才行。 我们先一步步的完成这个小的bootloader 1. 首先我们需要关闭看门狗: ldr r0, 0x53000000 //this is the address of wa 阅读全文