View Compilation Error

0_0_37849078_9316.cpp: In function 'void solve()':
0_0_37849078_9316.cpp:54:14: error: expected unqualified-id before '[' token
         auto [x, y] = a[i];
              ^
0_0_37849078_9316.cpp:55:34: error: 'x' was not declared in this scope
         b[(i - 1) * 4 + 1].inint(x - 1, y);
                                  ^
0_0_37849078_9316.cpp:55:41: error: 'y' was not declared in this scope
         b[(i - 1) * 4 + 1].inint(x - 1, y);
                                         ^