题目描述：

第一行输入一个数n，1 <= n <= 1000，下面输入n行数据，每一行有两个数，分别是x y。输出一组x y，该组数据是所有数据中x最小，且在x相等的情况下y最小的。

-Title Descr iption: The first line to enter a number of n, 1 < = n < = 1000, the following data input n rows, each row has two numbers, respectively, XY. Output a set of XY, the set of data is all data x minimum and smallest in the case of x equal y.