View Compilation Error

0_0_34205072_28321.cpp: In member function 'bool DLX::dance(int)':
0_0_34205072_28321.cpp:180:12: error: 'r' was not declared in this scope
         if(r[0]==0) return step<=K;
            ^
0_0_34205072_28321.cpp: In function 'int main()':
0_0_34205072_28321.cpp:265:18: error: 'struct DLX' has no member named 'Dance'
             if(g.Dance(0)) r=mid-mod;
                  ^