Compilare: main.cpp: In function 'int main()': main.cpp:28:17: 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] 28 | for(ll i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:30:17: 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] 30 | for(ll i=0;i<s.size();i++){ | ~^~~~~~~~~ main.cpp:32:21: 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] 32 | for(ll j=i;j<s.size() && j<i+20;j++){ | ~^~~~~~~~~ main.cpp:42:21: 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] 42 | for(ll j=0;j<t.size();j++){ | ~^~~~~~~~~