/in/foo.cc: In function 'int main()':
/in/foo.cc:44:24: error: 'LIS' was not declared in this scope
   cout << LIS(exp,t * n);
                        ^
/in/foo.cc:48:26: error: 'LIS' was not declared in this scope
  int lc = LIS(exp,sig * n);
                          ^