Compilare: main.cpp: In function 'int main()': main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0;i < s.size();++i) | ~~^~~~~~~~~~ main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int j = 0;j < p[code].size();++j) | ~~^~~~~~~~~~~~~~~~