Compilare: main.cpp: In function 'void add(node*, std::string, int)': main.cpp:26:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if(i==s.size()){nod->cnt++; return;} | ~^~~~~~~~~~ main.cpp: In function 'bool del(node*, std::string, int)': main.cpp:34:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if(i==s.size()){nod->cnt--;} | ~^~~~~~~~~~ main.cpp: In function 'int nrap(node*, std::string, int)': main.cpp:43:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | if(i==s.size())return nod->cnt; | ~^~~~~~~~~~ main.cpp: In function 'int prmax(node*, std::string, int, int)': main.cpp:49:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if(i==s.size())return cont; | ~^~~~~~~~~~