According to line 3 where all numbers ( 6-3-1) are incorrects we can eliminate 1 and 6 in first line where one number is correct and well placed, so the 2 is well placed:
2- ?- ?
According to line 2, two numbers are corrects but wrongly placed in (6-5-2) we know 6 is wrong and 2 is correct so the other correct number is 5, it can't be in first position occupied by 2, nor in second (wrong position) so it's the third:
2-?-5
According to fourth line two numbers are correct but wrongly placed (3-5-0), we know 3 is wrong so correct number is 0 and it fits in the last spot so correct code is:
2-0-5
!LOLZ

2-5