Compilare: main.cpp: In function 'int main()': main.cpp:42:32: warning: loop variable 'p' of type 'const std::pair<int, int>&' binds to a temporary constructed from type 'std::pair<const int, int>' [-Wrange-loop-construct] 42 | for (const pair<int, int>& p : sum) { | ^ main.cpp:42:32: note: use non-reference type 'const std::pair<int, int>' to make the copy explicit or 'const std::pair<const int, int>&' to prevent copying