> 定义这样一个结构去给std::sort排序，VC过了，G++就是CE
> struct INTERVAL
> {
> 	int b, e;
> 	INTERVAL(int _b = 0, int _e = 0) : b(_b), e(_e)
> 	{
> 		;
> 	}
> 	bool operator <(const INTERVAL &rhs)
> 	{
> 		int l1 = e - b;
> 		int l2 = rhs.e - rhs.b;
> 		if(l1 != l2)
> 		{
> 			return l1 < l2;
> 		}
> 		else
> 		{
> 			return memcmp(line + b, line + rhs.b, l1) < 0;
> 		}
> 	}
> };