View Compilation Error

0_0_37666140_9012.cpp: In function 'void bfs(int)':
0_0_37666140_9012.cpp:29:8: error: expected unqualified-id before '[' token
   auto [x, t] = q.top(); q.pop();
        ^
0_0_37666140_9012.cpp:30:9: error: 't' was not declared in this scope
   if (d[t] != cur)
         ^
0_0_37666140_9012.cpp:35:9: error: 't' was not declared in this scope
   if (d[t] < n && x >= ans[d[t]] && !st[t])
         ^
0_0_37666140_9012.cpp:35:19: error: 'x' was not declared in this scope
   if (d[t] < n && x >= ans[d[t]] && !st[t])
                   ^