/in/foo.c:2:2: error: expected identifier or '(' before numeric constant
  2 #define N 50001
  ^
/in/foo.c:2:4: error: stray '#' in program
  2 #define N 50001
    ^
/in/foo.c:4:2: error: expected identifier or '(' before numeric constant
  4 int main()
  ^