View Compilation Error

0_0_36450258_9310.cpp: In function 'void dfs(int, int)':
0_0_36450258_9310.cpp:13:15: error: expected unqualified-id before '[' token
     for (auto [v, w] : v[u]) {
               ^
0_0_36450258_9310.cpp:13:15: error: expected ';' before '[' token
0_0_36450258_9310.cpp:13:19: error: 'w' was not declared in this scope
     for (auto [v, w] : v[u]) {
                   ^
0_0_36450258_9310.cpp: In lambda function:
0_0_36450258_9310.cpp:13:22: error: expected '{' before ':' token
     for (auto [v, w] : v[u]) {
                      ^
0_0_36450258_9310.cpp: In function 'void dfs(int, int)':
0_0_36450258_9310.cpp:13:22: error: expected ';' before ':' token
0_0_36450258_9310.cpp:13:22: error: expected primary-expression before ':' token
0_0_36450258_9310.cpp:13:22: error: expected ')' before ':' token
0_0_36450258_9310.cpp:13:22: error: expected primary-expression before ':' token