/in/foo.cc: In function 'int main()':
/in/foo.cc:98:24: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%I64d\n", ans);
                        ^
/in/foo.cc:66:6: warning: unused variable 'txt' [-Wunused-variable]
  int txt, l = 1, k, i;
      ^~~
/in/foo.cc:66:11: warning: unused variable 'l' [-Wunused-variable]
  int txt, l = 1, k, i;
           ^