Compilare: main.cpp: In function 'int main()': main.cpp:23:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 23 | if(C.size()!=m+1) fout<<-1<<'\n'; | ~~~~~~~~^~~~~ main.cpp:25:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(i=0;i<C.size()-1;i++) fout<<C[i]<<' '; | ~^~~~~~~~~~~ main.cpp: In function 'void euler(int)': main.cpp:48:11: warning: unused variable 'i' [-Wunused-variable] 48 | {int nr,y,i; | ^