View Compilation Error

0_0_18224041_31060.cpp: In function 'void init()':
0_0_18224041_31060.cpp:40:5: error: 'sons' was not declared in this scope
     sons[j].push_back(i);
     ^
0_0_18224041_31060.cpp: In function 'int get(int, int)':
0_0_18224041_31060.cpp:55:21: error: 'sons' was not declared in this scope
  for(int i = 0; i < sons[k].size(); ++i) {
                     ^
0_0_18224041_31060.cpp: In function 'void gao(int, int)':
0_0_18224041_31060.cpp:84:20: error: 'sons' was not declared in this scope
  for(int s = (1 << sons[a[p]].size()) - 1; s; --s) {
                    ^
0_0_18224041_31060.cpp:86:6: error: 'contis' was not declared in this scope
   if(contis[v].second >= p - 1) {
      ^