Compilare: main.cpp: In function 'void decode(std::string, int, std::vector<int>&)': main.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i=0;i<s.size();i++){ | ~^~~~~~~~~ main.cpp:29:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0;i<v.size();i++){ | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int i=0;i<hb.size();i++){ | ~^~~~~~~~~~