Compilare: main.cpp: In function 'int main()': main.cpp:16:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(ll i=1;i<a.size();i++) { | ~^~~~~~~~~ main.cpp:21:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(ll i=0;i<a.size();i++) | ~^~~~~~~~~ main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(ll i=a.size();i<b.size();i++) { | ~^~~~~~~~~ main.cpp:30:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(ll i=0;i<v.size() && i<1000;i++) | ~^~~~~~~~~