View Compilation Error

0_0_38508454_13394.cpp: In function 'void dfs(int)':
0_0_38508454_13394.cpp:18:14: error: expected unqualified-id before '[' token
     for(auto [v, c1] : g[u]){
              ^
0_0_38508454_13394.cpp:18:14: error: expected ';' before '[' token
0_0_38508454_13394.cpp:18:15: error: 'v' was not declared in this scope
     for(auto [v, c1] : g[u]){
               ^
0_0_38508454_13394.cpp:18:18: error: 'c1' was not declared in this scope
     for(auto [v, c1] : g[u]){
                  ^
0_0_38508454_13394.cpp: In lambda function:
0_0_38508454_13394.cpp:18:22: error: expected '{' before ':' token
     for(auto [v, c1] : g[u]){
                      ^
0_0_38508454_13394.cpp: In function 'void dfs(int)':
0_0_38508454_13394.cpp:18:22: error: expected ';' before ':' token
0_0_38508454_13394.cpp:18:22: error: expected primary-expression before ':' token
0_0_38508454_13394.cpp:18:22: error: expected ')' before ':' token
0_0_38508454_13394.cpp:18:22: error: expected primary-expression before ':' token