Compilare: user.cpp: In function ‘int main()’: user.cpp:76:83: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((G[i][j] && h[i] && h[i] == h[j] - 1) || (G[i][j] && h[i]== comp_conx.size() && h[j]==1)) ^ user.cpp:81:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;comp_conx.size()>1 && i < comp_conx.size();++i) ^ user.cpp:87:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i =0;comp_conx.size()>1 && i < comp_conx.size()-1;++i) ^