Compilare: main.cpp: In function 'bool contains(std::string, std::string)': main.cpp:15:26: 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 i = 0; i < s.size() && idx < t.size(); i++) { | ~~^~~~~~~~~~ main.cpp:15:44: 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 i = 0; i < s.size() && idx < t.size(); i++) { | ~~~~^~~~~~~~~~ main.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | return idx == t.size(); | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if(lg_max < s.size()) { | ~~~~~~~^~~~~~~~~~ main.cpp:33:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | } else if(lg_max == s.size()) { | ~~~~~~~^~~~~~~~~~~ main.cpp:44:21: warning: unused variable 'cnt' [-Wunused-variable] 44 | int cnt = n; | ^~~