Compilare: main.cpp: In function 'void add(nod*&, int)': main.cpp:36:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if(poz < s.size()) | ~~~~^~~~~~~~~~ main.cpp: In function 'void rem(nod*&, int)': main.cpp:53:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | if(poz < s.size()) | ~~~~^~~~~~~~~~ main.cpp: In function 'int query(nod*, int)': main.cpp:68:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'void query1(nod*, int)': main.cpp:99:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | if(poz < s.size()) | ~~~~^~~~~~~~~~