View Compilation Error

0_0_35987991_4816.cpp: In function 'int main()':
0_0_35987991_4816.cpp:143:15: error: expected unqualified-id before '[' token
         auto &[head, e, deg] = g;
               ^
0_0_35987991_4816.cpp:143:15: error: expected initializer before '[' token
0_0_35987991_4816.cpp:148:32: error: 'head' was not declared in this scope
                 for (auto ii = head[u]; ii >= 0; ii = e[ii].second) {
                                ^
0_0_35987991_4816.cpp:148:55: error: 'e' was not declared in this scope
                 for (auto ii = head[u]; ii >= 0; ii = e[ii].second) {
                                                       ^