Compilare: main.cpp: In function 'void ins(arb*, int)': main.cpp:29:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'bool del(arb*, int)': main.cpp:45:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int query1(arb*, int)': main.cpp:68:13: 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 'int query2(arb*, int)': main.cpp:82:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | if (poz == s.size()) | ~~~~^~~~~~~~~~~