Compilare: user.cpp: In function ‘void solve_cod_poz(const std::vector<int>&, const std::vector<int>&, mat<int>&, int, std::vector<int>, int)’: user.cpp:32:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((poz_nou=(poz+pasi[i])) < gradina.size()){ ^ user.cpp: In function ‘void backtrack(const std::vector<int>&, const std::vector<int>&, int, int, std::vector<int>&, mat<int>&)’: user.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(din_cod.size() == num_biti){ ^ user.cpp:44:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < gradina.size(); ++i){ ^ user.cpp:47:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = din_cod.back()+1; i < pasi.size(); ++i){ ^ user.cpp: In function ‘int gaseste_max(const std::vector<int>&, const std::vector<int>&)’: user.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < gradina.size(); ++i){ ^ user.cpp:63:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int num_biti = 1; num_biti <= pasi.size(); ++num_biti){ ^ user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < pasi.size(); ++i){ ^ user.cpp:71:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < gradina.size(); ++i){ ^