View Compilation Error

0_0_23699923_23960.cpp: In function 'int main()':
0_0_23699923_23960.cpp:85:33: error: 'l' was not declared in this scope
             int x = findk(root, l), y = findk(root, r + 2);
                                 ^
0_0_23699923_23960.cpp:86:27: error: 'y' was not declared in this scope
     splay(x, root); splay(y, ch[x][1]);
                           ^