Compilare: main.cpp: In function 'bool prefix(const string&, const string&)': main.cpp:21:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'const long unsigned int' [-Wsign-compare] 21 | for (int i = 0; i < min(a.size() , b.size()); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void takeKidsOut(std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:28:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'std::string find_lca(std::string, std::string)': main.cpp:75:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'const long unsigned int' [-Wsign-compare] 75 | for (int i = 0; i < min(a.size() , b.size()); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void find_smallest_lca()': main.cpp:83:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:86:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | if (i + 1 < s.size()) { | ~~~~~~^~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:114:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 114 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:118:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for (int i = 0; i < s[i].size(); i++) { | ~~^~~~~~~~~~~~~