Compilare: main.cpp: In function 'void checkline(std::string, int, int)': main.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=0; i<a[line].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp:61:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i=0; i<a[line].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void add_dealer(int)': main.cpp:89:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for(int i=0; i<a[line].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp:99:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for(int i=0; i<dealers[nrd].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~