Compilare: user.cpp: In function ‘void uneste_vecini(int, int, int, const std::vector<std::vector<int> >&, const std::vector<std::vector<int> >&, multimi_disjuncte&)’: user.cpp:31:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ni < 0 || nj < 0 || ni >= valori.size() || nj >= valori.size()) continue; ^ user.cpp:31:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ni < 0 || nj < 0 || ni >= valori.size() || nj >= valori.size()) continue; ^ user.cpp: In function ‘int main()’: user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz < mat_sortata.size() && a[mat_sortata[poz].first][mat_sortata[poz].second] >= cost_cerut) { ^