View Compilation Error

0_0_39910585_30335.c:1:1: error: expected identifier or '(' before '?' token
    1 | ?????????????????????????????????????????????????????????????????????????????????????????
      | ^
0_0_39910585_30335.c:5:57: error: invalid suffix "n" on integer constant
    5 | ?????????????n(0<n<41)????????????????n?????????????????2n-1?????@?????????????????????
      |                                                         ^~
0_0_39910585_30335.c:5:66: error: stray '@' in program
    5 | ?????????????n(0<n<41)????????????????n?????????????????2n-1?????@?????????????????????
      |                                                                  ^