Compilare: main.cpp: In function 'bool contains(std::string, std::string)': main.cpp:10:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(int i = 0; i < s.size() && idx < t.size(); i++) { | ~~^~~~~~~~~~ main.cpp:10:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(int i = 0; i < s.size() && idx < t.size(); i++) { | ~~~~^~~~~~~~~~ main.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | return idx == t.size(); | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:21: warning: unused variable 'cnt' [-Wunused-variable] 39 | int cnt = n; | ^~~