View Compilation Error

0_0_36459118_6922.cpp: In function 'void Dfs(int, int)':
0_0_36459118_6922.cpp:27:15: error: expected unqualified-id before '[' token
   for (auto &&[v, c] : g[u]) {
               ^
0_0_36459118_6922.cpp:27:15: error: expected ';' before '[' token
0_0_36459118_6922.cpp:27:16: error: 'v' was not declared in this scope
   for (auto &&[v, c] : g[u]) {
                ^
0_0_36459118_6922.cpp:27:19: error: 'c' was not declared in this scope
   for (auto &&[v, c] : g[u]) {
                   ^
0_0_36459118_6922.cpp: In lambda function:
0_0_36459118_6922.cpp:27:22: error: expected '{' before ':' token
   for (auto &&[v, c] : g[u]) {
                      ^
0_0_36459118_6922.cpp: In function 'void Dfs(int, int)':
0_0_36459118_6922.cpp:27:22: error: expected ';' before ':' token
0_0_36459118_6922.cpp:27:22: error: expected primary-expression before ':' token
0_0_36459118_6922.cpp:27:22: error: expected ')' before ':' token
0_0_36459118_6922.cpp:27:22: error: expected primary-expression before ':' token