Compilare: main.cpp: In function 'bool solve(std::string, int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:56:38: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 56 | if (s[i] != v[i] || s.size() > n) | ~~~~~~~~~^~~ main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 62 | if (s.size() == n) | ~~~~~~~~~^~~~