Compilare: main.cpp: In function 'int main()': main.cpp:74:34: 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] 74 | for(ll j = 0 ; j < nr.size() ; j++) | ~~^~~~~~~~~~~ main.cpp:103:34: 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] 103 | for(ll j = 0 ; j < nr.size() ; j++) | ~~^~~~~~~~~~~ main.cpp:111:34: 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] 111 | for(ll j = 0 ; j < nr2.size() ; j++) | ~~^~~~~~~~~~~~ main.cpp:141:33: 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] 141 | for(ll j = 0 ; j < nr.size() ; j++) | ~~^~~~~~~~~~~ main.cpp:148:34: 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] 148 | for(ll j = 0 ; j < nr2.size() ; j++) | ~~^~~~~~~~~~~~