View Compilation Error

0_0_31410950_27761.cpp: In function 'void add(int, int, int, int, int, int)':
0_0_31410950_27761.cpp:58:10: error: 'node' was not declared in this scope
     op?++node[rt].num:--node[rt].num;
          ^
0_0_31410950_27761.cpp:64:40: error: 'Update' was not declared in this scope
     if(pos<=mid) Update(pos,lson,val,op);
                                        ^
0_0_31410950_27761.cpp:65:32: error: 'Update' was not declared in this scope
     else Update(pos,rson,val,op);
                                ^