42
0 12 18 33 36 38 6 4 35 27 16 26 17 30 20 31 14 2 37 1 13 3 2 16 5 23 40 10 11 9 7 34 32 19 28 21 24 8 25 17 15 41 

Test your program on this sequence using the command
  ./sort_array3.cpp < sortunique4.dat
The output should be:


0 1 2 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 17 18 19 20 21 23 24 25 26 27 28 30 31 32 33 34 35 36 37 38 40 41 
 there are duplicates