/in/foo.cc: In function 'int Find_Sec(int*, int)':
/in/foo.cc:6:6: warning: variable 'K' set but not used [-Wunused-but-set-variable]
  int K;
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:39:12: error: 'j' was not declared in this scope
   cin >> b[j];
            ^