Peter has a sequence of integers a1, a2, ..., an. Peter wants all numbers in the sequence to equalh. He can perform the operation of "adding one on the segment[l, r]": add one to all elements of the
题目: Given a binary search tree and a node in it, find the in-order successor of that node in the BST. Note: If the given node has no in-order successor in the tree, return null. 题解: 用了递归。循环应该略有难
安最近开始乘坐地铁上下班。我们知道,地铁票的单程票价为 a a a 卢布。此外,安安还发现她可以购买 m m m 次的特价票(可以多次购买)。票价为 b b b 卢布。安计算了一下,她需要乘坐地铁 n n n 次。请帮助安,告诉她最少要花多少钱才能乘坐 n n n 次地铁? 输入 单行包含四个空格分隔的整数 n n n 、 m m m 、 a a a 、 b ( 1 ≤ n ,
Problem Given a string, determine if a permutation of the string could form a palindrome. For example, “code” -> False, “aab” -> True, “carerac” -> True. Hint: Consider the palindromes of odd vs
Git 提交报错: Push failed Enumerating objects: 266, done. Delta compression using up to 8 threads Total 266 (delta 45), reused 0 (delta 0) the remote end hung up unexpectedly the remote end hung up une