View Compilation Error

0_0_36457911_25547.cpp: In function 'void tree_change(long long int, long long int, long long int)':
0_0_36457911_25547.cpp:87:15: error: 'dep' was not declared in this scope
       r = r - dep[v] + dep[tot[v]];
               ^
0_0_36457911_25547.cpp:87:33: error: invalid types 'long long int[long long int]' for array subscript
       r = r - dep[v] + dep[tot[v]];
                                 ^