View Compilation Error

0_0_38457428_11644.cpp: In function 'void dfs(int, int)':
0_0_38457428_11644.cpp:51:12: error: expected unqualified-id before '[' token
   for(auto [x,y]:qry[u])
            ^
0_0_38457428_11644.cpp:51:12: error: expected ';' before '[' token
0_0_38457428_11644.cpp:51:13: error: 'x' was not declared in this scope
   for(auto [x,y]:qry[u])
             ^
0_0_38457428_11644.cpp:51:15: error: 'y' was not declared in this scope
   for(auto [x,y]:qry[u])
               ^
0_0_38457428_11644.cpp: In lambda function:
0_0_38457428_11644.cpp:51:17: error: expected '{' before ':' token
   for(auto [x,y]:qry[u])
                 ^
0_0_38457428_11644.cpp: In function 'void dfs(int, int)':
0_0_38457428_11644.cpp:51:17: error: expected ';' before ':' token
0_0_38457428_11644.cpp:51:17: error: expected primary-expression before ':' token
0_0_38457428_11644.cpp:51:17: error: expected ')' before ':' token
0_0_38457428_11644.cpp:51:17: error: expected primary-expression before ':' token