Compilare: main.cpp: In function 'bool contains(std::string, std::string)': main.cpp:14:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < s.size() && idx < t.size(); i++) { | ~~^~~~~~~~~~ main.cpp:14:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < s.size() && idx < t.size(); i++) { | ~~~~^~~~~~~~~~ main.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | return idx == t.size(); | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if(lg_max < s.size()) { | ~~~~~~~^~~~~~~~~~ main.cpp:34:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | } else if(lg_max == s.size()) { | ~~~~~~~^~~~~~~~~~~ main.cpp:45:21: warning: unused variable 'cnt' [-Wunused-variable] 45 | int cnt = n; | ^~~