Compilare: main.cpp: In function 'double geometric::optimal_distance(const std::vector<point>&, int, int)': main.cpp:31:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<geometric::point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int i = 0 ; i < sorted.size() ; ++i) | ~~^~~~~~~~~~~~~~~ main.cpp:32:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<geometric::point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int j = i + 1 ; j < sorted.size() && j - i <= 15 ; ++j) | ~~^~~~~~~~~~~~~~~