Compilare: user.cpp: In function ‘void interclas(Point*, int, int, int)’: user.cpp:43:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < k; i++) ^ user.cpp: In function ‘llong closestDistance(int, int, Point*, Point&, Point&)’: user.cpp:80:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < dr; i++) ^ user.cpp:82:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = i+1; j <= dr; j++) ^ user.cpp:113:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = st; i < dr; i++) ^ user.cpp:118:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = i + 1; j <= dr; j++) ^