lintcode 中等题：Min stack 最小栈

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[CareerCup] 3.2 Min Stack 最小栈

3.2 How would you design a stack which, in addition to push and pop, also has a function min which returns the minimum element? Push, pop and min should all operate in O(1) time. LeetCode上的原题,请参见我之前的博客Min Stack 最小栈.…

lintcode 中等题：Min stack 最小栈

题目带最小值操作的栈实现一个带有取最小值min方法的栈,min方法将返回当前栈中的最小值. 你实现的栈将支持push,pop 和 min 操作,所有操作要求都在O(1)时间内完成. 解题可以定义一个数组或者其他的存储最小值,第i个元素,表示栈中前i个元素的最小值. 定义两个ArrayList来存储栈,一个ArrayList存储当前栈中的元素,一个ArrayList存储最小栈,并且其第i个元素表示栈中前i个元素的最小值,这样两个栈的长度是始终一样的入栈:最小栈需要加入的元素是当前要入的元…

[LintCode] Min Stack 最小栈

Implement a stack with min() function, which will return the smallest number in the stack. It should support push, pop and min operation all in O(1) cost. Notice min operation will never be called if there is no number in the stack. Have you met this…

[LeetCode] 0155. Min Stack 最小栈 & C++Runtime加速

题目 Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimu…

[LeetCode] Min Stack 最小栈

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimum e…

[LeetCode] 155. Min Stack 最小栈

Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. getMin() -- Retrieve the minimum e…

第30题：LeetCode155. Min Stack最小栈

设计一个支持 push,pop,top 操作,并能在O(1)时间内检索到最小元素的栈. push(x) -- 将元素 x 推入栈中. pop() -- 删除栈顶的元素. top() -- 获取栈顶元素. getMin() -- 检索栈中的最小元素. 示例: MinStack minStack = new MinStack(); minStack.push(-2); minStack.push(0); minStack.push(-3); minStack.getMin(); --> 返回 -3.…