View Compilation Error

0_0_38500456_29537.cpp: In function 'void solve()':
0_0_38500456_29537.cpp:58:7: error: expected unqualified-id before '[' token
  auto [y1, y2] = get(ai, bi, ci);
       ^
0_0_38500456_29537.cpp:60:8: error: 'y1' was not declared in this scope
     if(y1 == -1 && y2 == -1){
        ^
0_0_38500456_29537.cpp:60:20: error: 'y2' was not declared in this scope
     if(y1 == -1 && y2 == -1){
                    ^
0_0_38500456_29537.cpp:65:17: error: 'y1' was not declared in this scope
     ll x1 = a - y1;
                 ^
0_0_38500456_29537.cpp:66:17: error: 'y2' was not declared in this scope
     ll x2 = a - y2;
                 ^