I only add std::move() manually to the TLE code, and it got AC.
But why ????? Shouldn't the Compiler add std::move() automatically ??????

C++ Compiler of Codeforces can't add std::move automatically ??????
I only add std::move() manually to the TLE code, and it got AC.
But why ????? Shouldn't the Compiler add std::move() automatically ??????
