Compilare: main.cpp: In function 'void add(int, std::string&, trie*)': main.cpp:22:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if(i==s.size()) | ~^~~~~~~~~~ main.cpp: In function 'bool del(int, std::string&, trie*)': main.cpp:41:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if(i==s.size()) | ~^~~~~~~~~~ main.cpp: In function 'int num(int, std::string&, trie*)': main.cpp:66:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | if(i==s.size()) return node->cnt; | ~^~~~~~~~~~ main.cpp: In function 'int pref(int, std::string&, trie*)': main.cpp:73:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | if(i==s.size()) return i; | ~^~~~~~~~~~