Olivier Hudry
Here is the program.
After compiling the program, you may try it on this example. The value of a best solution is 29273 and a best solution is : 4 > 21 > 3 > 19 > 9 > 0 > 15 > 11 > 16 > 6 > 1 > 8 > 2 > 5 > 17 > 14 > 18 > 12 > 13 > 7 > 10 > 20.