Compilare: user.cpp: In function ‘bool comparePoints(Point, Point)’: user.cpp:19:33: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (a.x<b.x)||(a.x==b.x)&&(a.y<b.y); ^ user.cpp: In function ‘void convexHull()’: user.cpp:31:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < v.size(); i++) { ^ user.cpp: In function ‘void write()’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<h.size(); i++) { ^