/in/foo.c:1:1: error: unknown type name 'import'
 import math
 ^~~~~~
/in/foo.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'n'
 n=int(input())
 ^
/in/foo.c:5:2: error: invalid preprocessing directive #python3
 #python3
  ^~~~~~~