Compilare: main.cpp: In function 'auto create(size_t, Args&& ...)': main.cpp:19:8: warning: 'if constexpr' only available with '-std=c++17' or '-std=gnu++17' 19 | if constexpr(sizeof...(args) == 1) return; | ^~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:56:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 56 | for(auto& [x, y] : a) { | ^