View Compilation Error

0_0_30766742_300.cpp: In function 'void add(int, int)':
0_0_30766742_300.cpp:37:3: error: 'll' was not declared in this scope
   ll _x=x,_y=y;
   ^
0_0_30766742_300.cpp:38:11: error: '_x' was not declared in this scope
   int hs=(_x<<31|_y)%maxsz;
           ^
0_0_30766742_300.cpp:38:18: error: '_y' was not declared in this scope
   int hs=(_x<<31|_y)%maxsz;
                  ^
0_0_30766742_300.cpp: In function 'int find(int, int)':
0_0_30766742_300.cpp:49:11: error: '_x' was not declared in this scope
   int hs=(_x<<31|_y)%maxsz;
           ^
0_0_30766742_300.cpp:49:18: error: '_y' was not declared in this scope
   int hs=(_x<<31|_y)%maxsz;
                  ^