Compilare: main.cpp: In function 'std::vector<int> decompose(int)': main.cpp:25:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i=0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=1; i<p.size(); i++) | ~^~~~~~~~~