Compilare: main.cpp: In function 'int f(std::string, int)': main.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:34:34: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 34 | if(s[i]!=v[i] || s.size()>n) | ~~~~~~~~^~ main.cpp:39:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | if(s.size()==n) | ~~~~~~~~^~~