View Compilation Error

0_0_31037457_30339.cpp: In function 'long long int count(int)':
0_0_31037457_30339.cpp:112:33: error: 'class std::vector<node>' has no member named 'sonnum'
         for (int j = 0; j < dis.sonnum(); ++j) {
                                 ^
0_0_31037457_30339.cpp:120:31: error: 'class std::vector<node>' has no member named 'sonnum'
         for(int j = 0;j < dis.sonnum();++ j){
                               ^