View Compilation Error

0_0_32391756_22572.cpp: In function 'int main()':
0_0_32391756_22572.cpp:261:12: error: expected unqualified-id before '[' token
       auto [x, y] = e[i];
            ^
0_0_32391756_22572.cpp:262:24: error: 'x' was not declared in this scope
       Node *p = pool + x, *q = pool + y;
                        ^
0_0_32391756_22572.cpp:263:15: error: 'q' was not declared in this scope
       link(p, q);
               ^