View Compilation Error

0_0_30252518_22638.cpp: In member function 'void Link_Cut_Tree::sol()':
0_0_30252518_22638.cpp:97:14: error: 'n' was not declared in this scope
    make_root(n+1);
              ^
0_0_30252518_22638.cpp:103:10: error: 'A' was not declared in this scope
    cut(x,A[x]);
          ^
0_0_30252518_22638.cpp:104:17: error: 'n' was not declared in this scope
    A[x]=min(x+y,n+1);
                 ^