Compilare: user.cpp: In function ‘void mark_component(int, const std::vector<std::vector<int> >&, std::vector<bool>&, std::vector<int>&)’: user.cpp:11:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vec[cur].size(); ++i){ ^ user.cpp: In function ‘bool self_connected(const std::vector<int>&)’: user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < v.size(); ++i){ ^ user.cpp: In function ‘int nr_moduri(const std::vector<std::vector<int> >&, const std::vector<bool>&, std::vector<bool>&)’: user.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vec.size(); ++i){ ^ user.cpp:45:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < comp.size(); ++j){ ^ user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( ; start < comp.size(); start += 2){ ^ user.cpp: In function ‘int main()’: user.cpp:109:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < best_rez.size(); i += 2){ ^ user.cpp:114:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; 2*i < best_rez.size(); ++i){ ^ user.cpp:120:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < biperm[i].size(); ++j){ ^