Compilare: main.cpp: In function 'int main()': main.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for( int i = 0; i<playlist.size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp:45:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for( int i = 0; i<playlist.size(); i++) | ~^~~~~~~~~~~~~~~~