Compilare: main.cpp: In function 'void find_intersections()': main.cpp:104:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<p1.size();++i) ~^~~~~~~~~~ main.cpp:106:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<p2.size();++j) ~^~~~~~~~~~ main.cpp: In function 'void find_points_inside()': main.cpp:128:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < p2.size() - 1;++i) ~~^~~~~~~~~~~~~~~ main.cpp:132:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0;j < p1.size() - 1;++j) ~~^~~~~~~~~~~~~~~ main.cpp:146:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < p1.size() - 1;++i) ~~^~~~~~~~~~~~~~~ main.cpp:150:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0;j < p2.size() - 1;++j) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void Sort()': main.cpp:175:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<p.size();++i) ~^~~~~~~~~ main.cpp: In function 'void convex_hull()': main.cpp:189:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<p.size();++i) ~^~~~~~~~~