View Compilation Error

0_0_36582040_22549.cpp: In function 'std::pair<long long int, long long int> dfs(int, int)':
0_0_36582040_22549.cpp:40:14: error: expected unqualified-id before '[' token
         auto [lv, rv] = dfs(q, ni);
              ^
0_0_36582040_22549.cpp:43:33: error: 'lv' was not declared in this scope
         best_l += max(abs(lq-l)+lv, abs(rq-l)+rv);
                                 ^
0_0_36582040_22549.cpp:43:47: error: 'rv' was not declared in this scope
         best_l += max(abs(lq-l)+lv, abs(rq-l)+rv);
                                               ^