Compilare: main.cpp: In function 'void Insert(int, int, NodTrie*)': main.cpp:25:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | if(st == s.size()) return; | ~~~^~~~~~~~~~~ main.cpp: In function 'void Delete(int, NodTrie*)': main.cpp:41:11: 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(st == s.size()) return; | ~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:65:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(j = 0; j < s.size(); j++) Insert(j, i); | ~~^~~~~~~~~~ main.cpp:71:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(j = 0; j < s.size(); j++) Delete(j); | ~~^~~~~~~~~~