/in/foo.c: In function 'main':
/in/foo.c:38:7: error: conflicting types for 's'
  char s[200000];
       ^
/in/foo.c:37:7: note: previous declaration of 's' was here
  char s[100000];
       ^
/in/foo.c:44:19: error: 'r' undeclared (first use in this function)
  Match(s, n1, n2, r);
                   ^
/in/foo.c:44:19: note: each undeclared identifier is reported only once for each function it appears in