Compilare: main.cpp: In function 'int main()': main.cpp:54:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<om>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int i=0;i<p.size();i++) | ~^~~~~~~~~ main.cpp:57:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<om>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int j=i+1;j<p.size();j++) | ~^~~~~~~~~