Title Description: 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.

1170\1170.c
....\1170.dsp
....\1170.dsw
....\1170.ncb
....\1170.opt
....\1170.plg
....\Debug\1170.exe
....\.....\1170.ilk
....\.....\1170.obj
....\.....\1170.pch
....\.....\1170.pdb
....\.....\vc60.idb
....\.....\vc60.pdb
....\Debug
1170

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