Compilare: main.cpp: In function 'void bfs(int, point, point, const std::vector<point>&)': main.cpp:36:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int i = 0; i < prev.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for (int i = 0; i < blocked.size(); i++) { | ~~^~~~~~~~~~~~~~~~