/in/foo.cc: In function 'int main()':
/in/foo.cc:119:15: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100001]' [-Wformat=]
  scanf("%s",&t);
               ^
/in/foo.cc:123:16: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100001]' [-Wformat=]
   scanf("%s",&s);
                ^
/in/foo.cc:129:18: warning: array subscript has type 'char' [-Wchar-subscripts]
   putchar(t[bk[i]]);
                  ^