Compilare: main.cpp: In function 'bool full_of_one(std::string)': main.cpp:15:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int indice = 0; indice < s.size(); indice++) | ~~~~~~~^~~~~~~~~~ main.cpp: In function 'int add(std::string, std::string)': main.cpp:34:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if(cnt == s1.size()) | ~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:66:26: 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] 66 | for(int i = 1; i < v.size(); i++) | ~~^~~~~~~~~~