Compilare: main.cpp: In function 'void f1(int)': main.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i = 0; i < v.size(); ++i) { | ~~^~~~~~~~~~ main.cpp: In function 'void f2(std::vector<int>)': main.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i = 0; i < v.size(); ++i) { | ~~^~~~~~~~~~