Compilare: main.cpp: In function 'void Do()': main.cpp:75:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < rg.size(); ++i ) ~~^~~~~~~~~~~ main.cpp:77:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < up.size(); ++i ) ~~^~~~~~~~~~~ main.cpp:79:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < lf.size(); ++i ) ~~^~~~~~~~~~~ main.cpp:88:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 2; i < points.size(); ++i ) ~~^~~~~~~~~~~~~~~ main.cpp:98:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < S.size(); ++i ) ~~^~~~~~~~~~ main.cpp: In function 'int Orientation(p, p, p)': main.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type] } ^