摘要：
由于题目告诉肯定至少存在一种解，故只需要根据条件遍历一下， vector makeExpression(int y) { vector res; for(int i = -1000; i =-1000 && k<=1000 && k!=0 && k!=1){ ... 阅读全文
摘要：
Given a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is captured by flipping all'O's into'X's in that surrounded region... 阅读全文
摘要：
Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number.An example is the root-to-leaf path1->2->3which rep... 阅读全文
摘要：
There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costscost[... 阅读全文