摘要：
1.题目描述 Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not 阅读全文
摘要：
1.题目描述 Divide two integers without using multiplication, division and mod operator. If it is overflow, return MAX_INT. 不使用乘除法的情况下作除法，溢出的话返回MAX-INT。 2. 阅读全文