View Compilation Error

0_0_38739139_16896.cpp: In function 'int main()':
0_0_38739139_16896.cpp:107:13: error: 'ii' was not declared in this scope
  107 |     int T = ii();
      |             ^~
0_0_38739139_16896.cpp:124:9: error: 'oo' was not declared in this scope
  124 |         oo(ans.x);
      |         ^~
0_0_38739139_16896.cpp:126:5: error: 'flush' was not declared in this scope; did you mean 'std::flush'?
  126 |     flush();
      |     ^~~~~
      |     std::flush
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/unique_ptr.h:42,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/memory:78,
                 from .\stdc++.h:56:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:757:5: note: 'std::flush' declared here
  757 |     flush(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~~