View Compilation Error

0_0_22454366_9161.cpp: In function 'void CDQ(int, int)':
0_0_22454366_9161.cpp:91:52: error: 'm' was not declared in this scope
             tree.modify(rec[l].z, rec[l].value, 0, m, 1);
                                                    ^
0_0_22454366_9161.cpp:96:80: error: 'm' was not declared in this scope
             rec[r].value = merge_Node(rec[r].value, tree.query(0, rec[r].z, 0, m, 1));
                                                                                ^
0_0_22454366_9161.cpp:104:76: error: 'm' was not declared in this scope
         rec[r].value = merge_Node(rec[r].value, tree.query(0, rec[r].z, 0, m, 1));
                                                                            ^
0_0_22454366_9161.cpp:110:19: error: 'm' was not declared in this scope
     tree.delet(0, m, 1);
                   ^