/in/foo.c: In function 'main':
/in/foo.c:10:17: warning: unused variable 'i' [-Wunused-variable]
  int a[10000],n,i;
                 ^
/tmp/cc8DZjWT.o: In function `main':
foo.c:(.text.startup+0x28): undefined reference to `Input'
foo.c:(.text.startup+0x34): undefined reference to `FindiMax'
collect2: error: ld returned 1 exit status