Strange. It compiles and runs for me under Windows 8.1, 64-bit:

22:52 >perl 1870_Med.pl
Show all solutions that sum to 100
123-45-67+89
12-3-4+5-6+7+89
12+3+4+5-6-7+89
123+4-5+67-89
-1+2-3+4+5+6+78+9
1+2+3-4+5+6+78+9
12+3-4+5+67+8+9
1+23-4+56+7+8+9
1+2+34-5+67-8+9
1+23-4+5+6+78-9
123+45-67+8-9
123-4-5-6-7+8-9
Show the sum that has the maximum number of solutions
sum: 9; solutions: 46
Show the lowest positive sum that can't be expressed
211
Show the ten highest numbers that can be expressed
123456789
23456790
23456788
12345687
12345669
3456801
3456792
3456790
3456788
3456786

22:52 >perl -v

This is perl 5, version 26, subversion 0 (v5.26.0) built for MSWin32-x
+64-multi-thread-ld
[download]

Have you double-checked the contents of your choroba.pl file?

Update: FWIW, I get the same result under Cygwin:

$ perl -v

This is perl 5, version 22, subversion 4 (v5.22.4) built for cygwin-th
+read-multi
[download]