摘要:
Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT. 题目要求不能使用除号、乘号和取余操作符。 我们使用移位操作符。<< 左移代表 阅读全文
摘要:
Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array whic 阅读全文