Hello everyone. As a person that extremely enjoys competitve programming, and thus enjoys Codeforces problems I really want to adress this issue.

Problem link: http://codeforces.net/contest/321/problem/C

My submission (Wrong code and get AC): http://codeforces.net/contest/321/submission/26788450

rng_58 submission (Right Code and get AC too): http://codeforces.net/contest/321/submission/3973635

Input:

60

1 2 1 3 3 4 3 5 5 6 5 7 7 8 7 9 9 10 9 11 11 12 11 13 13 14 13 15 15 16 15 17 17 18 17 19 19 20 19 21 21 22 21 23 23 24 23 25 25 26 25 27 27 28 27 29 29 30 29 31 31 32 31 33 33 34 33 35 35 36 35 37 37 38 37 39 39 40 39 41 41 42 41 43 43 44 43 45 45 46 45 47 47 48 47 49 49 50 49 51 51 52 51 53 53 54 53 55 55 56 55 57 57 58 57 59 59 60

OUTPUT: (rng_58) red coder it's the right output

E F D E E F C D E F D E E F B C E F D E C D E F D E E F A B E F D E E F C D E F D E E F B C E F D E E F C D E F D E E F

my OUTPUT:

Impossible!

This picture explain my test case:

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