View Compilation Error

0_0_37893333_31684.cpp: In member function 'bool Flow::bfs(long long int, long long int)':
0_0_37893333_31684.cpp:25:22: error: expected unqualified-id before '[' token
                 auto [v,w]=e[j];
                      ^
0_0_37893333_31684.cpp:26:22: error: 'v' was not declared in this scope
                 if(d[v]==-1&&w){
                      ^
0_0_37893333_31684.cpp:26:30: error: 'w' was not declared in this scope
                 if(d[v]==-1&&w){
                              ^
0_0_37893333_31684.cpp: In member function 'long long int Flow::find(long long int, long long int, long long int)':
0_0_37893333_31684.cpp:40:18: error: expected unqualified-id before '[' token
             auto [v,w]=e[j];
                  ^
0_0_37893333_31684.cpp:41:18: error: 'v' was not declared in this scope
             if(d[v]==d[u]+1&&w){
                  ^
0_0_37893333_31684.cpp:41:30: error: 'w' was not declared in this scope
             if(d[v]==d[u]+1&&w){
                              ^