prove by argument Exchange !

Правка en2, от Hazemzz, 2016-12-22 23:27:02

Please i need some help in this problem here why the solution is to sort by S/T ?

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en2 Английский Hazemzz 2016-12-22 23:27:02 127
en1 Английский Hazemzz 2016-12-22 23:25:21 266 Initial revision (published)