View Compilation Error

0_0_38021384_2474.cpp: In function 'void show(int)':
0_0_38021384_2474.cpp:78:18: error: expected unqualified-id before '[' token
             auto [node,left,right] = que[i];
                  ^
0_0_38021384_2474.cpp:81:35: error: invalid operands of types 'std::ios_base&(std::ios_base&)' and 'std::ios_base&(std::ios_base&)' to binary 'operator+'
                 int mid = (left + right) / 2;
                                   ^
0_0_38021384_2474.cpp:83:41: error: 'node' was not declared in this scope
                 que[tot] = array<int,3>{node << 1, left, mid};
                                         ^