Compilare: main.cpp: In function 'bool nu_ap(std::vector<int>&, int)': main.cpp:12:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<numere.size();i++)if(numere[i]==numar)return false; ~^~~~~~~~~~~~~~ main.cpp: In function 'void afis_perm(std::vector<int>&)': main.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(numere.size()==nr_el){ ~~~~~~~~~~~~~^~~~~~~ main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<numere.size();i++)out<<numere[i]<<' '; ~^~~~~~~~~~~~~~