Compilare: main.cpp: In function 'int main()': main.cpp:27:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(ll i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:29:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(ll i=0;i<s.size();i++){ | ~^~~~~~~~~ main.cpp:31:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(ll j=i;j<s.size() && j<i+20;j++){ | ~^~~~~~~~~ main.cpp:41:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(ll j=0;j<t.size();j++){ | ~^~~~~~~~~