Compilare: user.cpp: In function ‘void unic(std::vector<point>&)’: user.cpp:81:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1 ; i < A.size() ; ++i ){ ^ user.cpp: In function ‘void nofitpolygon(std::vector<point>&, std::vector<point>&)’: user.cpp:119:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0 ; i < poligon.size() ; ++i ){ ^ user.cpp:120:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0 ; j < origine.size() ; ++j ){ ^ user.cpp: In function ‘void build_graph()’: user.cpp:224:84: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] point prec = P[p][x == 0 ? P[p].size()-2 : x-1],next = P[p][x == P[p].size()-1 ? 1 : x+1]; ^ user.cpp:236:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( x < P[p].size()-1 ){ ^ user.cpp:243:89: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] point prec = P[p][vf1 == 0 ? P[p].size()-2 : vf1-1],next = P[p][vf1 == P[p].size()-1 ? 1 : vf1+1]; ^ user.cpp:249:89: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] point prec = P[p][vf2 == 0 ? P[p].size()-2 : vf2-1],next = P[p][vf2 == P[p].size()-1 ? 1 : vf2+1]; ^ user.cpp:261:89: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] point prec = P[p][vf1 == 0 ? P[p].size()-2 : vf1-1],next = P[p][vf1 == P[p].size()-1 ? 1 : vf1+1]; ^