Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > ConvexHull(std::vector<std::pair<int, int> >)': main.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < hull.size(); ++i) ~~^~~~~~~~~~~~~ main.cpp: In function 'double Area(std::vector<std::pair<int, int> >)': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p.size() - 1; ++i) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int Solve(std::vector<int>, std::vector<std::pair<int, int> >)': main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < p.size() - 1; ++i) ~~^~~~~~~~~~~~~~ main.cpp:66:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (underHull.size() != szUnderHull || aboveHull.size() != szAboveHull) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:66:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (underHull.size() != szUnderHull || aboveHull.size() != szAboveHull) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~