Compilare: main.cpp: In function 'int main()': main.cpp:67:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < points.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:86:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < points.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:102:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < points.size(); i++) ~~^~~~~~~~~~~~~~~