View Compilation Error

0_0_35431016_28774.cpp: In function 'int main()':
0_0_35431016_28774.cpp:117:26: error: expected unqualified-id before '[' token
                     auto [val, pos] = tr.qmin(1, 1, n, 1, n);
                          ^
0_0_35431016_28774.cpp:119:24: error: 'val' was not declared in this scope
                     if(val > 0) break;
                        ^
0_0_35431016_28774.cpp:120:25: error: 'pos' was not declared in this scope
                     add(pos, 1);
                         ^