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Implement Queue using Stacks
该题算是比较简单的,思路是定义两个栈,一个做为入栈,一个做为出栈。入队列的话直接将元素压入入栈,出队列的话首先判断出栈是否为空,为空则将入栈中的元素依次压入出栈中,再从出栈弹出元素。 class Queue { public: // Push element x to the back of queue. void push(int x) { instack.pu...
分类:其他好文   时间:2015-07-12 11:22:24    阅读次数:132
[LeetCode][Java] Next Permutation
题目: Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest p...
分类:编程语言   时间:2015-07-12 11:20:56    阅读次数:206
Implement Queue using Stacks(用栈实现队列)
Implement the following operations of a queue using stacks. push(x) -- Push element x to the back of queue.pop() -- Removes the element from in front of queue.peek() -- Get the front element.empty(...
分类:其他好文   时间:2015-07-11 16:48:45    阅读次数:86
[LeetCode][Java] Implement strStr()
题目: Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 题意: 实现strStr() 返回needle在haystack中第一次出现的位置,如果haystack中不存在needl...
分类:编程语言   时间:2015-07-11 09:17:03    阅读次数:196
232. Implement Queue using Stacks
Implement the following operations of a queue using stacks.push(x) -- Push element x to the back of queue.pop() -- Removes the element from in front o...
分类:其他好文   时间:2015-07-11 07:54:35    阅读次数:116
LeetCode225:Implement Stack using Queues
Implement the following operations of a stack using queues.push(x) – Push element x onto stack. pop() – Removes the element on top of the stack. top() – Get the top element. empty() – Return whether...
分类:其他好文   时间:2015-07-10 23:45:02    阅读次数:146
LeetCode232:Implement Queue using Stacks
Implement the following operations of a queue using stacks. push(x) – Push element x to the back of queue. pop() – Removes the element from in front of queue. peek() – Get the front element. empty() –...
分类:其他好文   时间:2015-07-10 23:44:01    阅读次数:153
C中strstr的实现方法
做题目的时候需要自己实现strstr函数/************************************************************************/ /* 编写函数IND,让它判断一个字符串是否为另一个字符串的子串的功能,若是则返回第一次出现的起始位置,否则返回0。 /* /***********************************...
分类:其他好文   时间:2015-07-10 19:10:03    阅读次数:117
Swift入坑--@selector
在Swift中@selector 直接用 "methodName" 就可以了,如果后面有参数记得加上冒号 "methodName:" “does not implement methodSignatureForSelector: -- trouble ahead” “does not implement doesNotRecognizeSelector: -- abort” 如果...
分类:编程语言   时间:2015-07-10 19:05:24    阅读次数:154
LeetCode225 Implemet Stack using Queues Java题解
题目: Implement the following operations of a stack using queues. push(x) -- Push element x onto stack.pop() -- Removes the element on top of the stack.top() -- Get the top element.empty() -- Re...
分类:编程语言   时间:2015-07-09 14:41:27    阅读次数:135
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