View Compilation Error

0_0_37481686_618.cpp: In function 'void Dfs(int)':
0_0_37481686_618.cpp:84:20: error: expected unqualified-id before '[' token
   for (const auto &[w, v] : g[u]) {
                    ^
0_0_37481686_618.cpp:84:20: error: expected ';' before '[' token
0_0_37481686_618.cpp:84:21: error: 'w' was not declared in this scope
   for (const auto &[w, v] : g[u]) {
                     ^
0_0_37481686_618.cpp:84:24: error: 'v' was not declared in this scope
   for (const auto &[w, v] : g[u]) {
                        ^
0_0_37481686_618.cpp: In lambda function:
0_0_37481686_618.cpp:84:27: error: expected '{' before ':' token
   for (const auto &[w, v] : g[u]) {
                           ^
0_0_37481686_618.cpp: In function 'void Dfs(int)':
0_0_37481686_618.cpp:84:27: error: expected ';' before ':' token
0_0_37481686_618.cpp:84:27: error: expected primary-expression before ':' token
0_0_37481686_618.cpp:84:27: error: expected ')' before ':' token
0_0_37481686_618.cpp:84:27: error: expected primary-expression before ':' token