Compilare: user.cpp: In function ‘void BuildV()’: user.cpp:53:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<InitialPoints.size(); i++) ^ user.cpp: In function ‘void BuildEdges(char)’: user.cpp:95:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<Line.size(); j++) ^ user.cpp:102:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0; k<Rectangles[Line[j].second].size(); k++) ^ user.cpp:66:18: warning: unused variable ‘l’ [-Wunused-variable] int i, j, k, l; ^ user.cpp: In function ‘int Build(int, int, int, int)’: user.cpp:157:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i<Hor.size() && Hor[i].second<=y2; i++) ^ user.cpp:162:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0, j=0; i<MySet.size(); i++) ^ user.cpp:164:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j<MySet.size() && MySet[j]-MySet[i]<x2-x1) ^ user.cpp:166:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j>=MySet.size()) break; ^ user.cpp: In function ‘int Count()’: user.cpp:178:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<Ver.size(); i++) ^ user.cpp:179:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=i+1; j<Ver.size(); j++) ^ user.cpp:176:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k; ^ user.cpp: In function ‘void BuildEdges(char)’: user.cpp:114:83: warning: ‘current’ may be used uninitialized in this function [-Wmaybe-uninitialized] Ver.push_back(make_pair(make_pair(V[first].y, V[current].y), V[i].x)); ^ user.cpp:114:83: warning: ‘first’ may be used uninitialized in this function [-Wmaybe-uninitialized]