Compilare: user.cpp: In function ‘double DI(int, int, std::vector<std::pair<int, int> >&, std::vector<std::pair<int, int> >&)’: user.cpp:57:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < z.size(); i++) ^ user.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i+1;j< z.size() && z[j].Y - z[i].Y <= distRecursie; j++) ^ user.cpp:41:27: warning: unused variable ‘j’ [-Wunused-variable] int m = (st + dr)/2,i,j; ^