Compilare: user.cpp: In function ‘void GetSol()’: user.cpp:68:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<PV.size();i++)dx[i]=dx[i-1]+(PV[i].x-PV[i-1].y); ^ user.cpp:70:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<PO.size();i++)dy[i]=dy[i-1]+(PO[i].x-PO[i-1].y); ^ user.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<=PV.size() && j<=PO.size() ) ^ user.cpp:72:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<=PV.size() && j<=PO.size() ) ^