Compilare: main.cpp: In function 'int BFS(coord, int, int)': main.cpp:85:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<field, std::allocator<field> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | if((nrp == portals.size()) && (first == false)){ | ~~~~^~~~~~~~~~~~~~~~~ main.cpp:90:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<field, std::allocator<field> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | }else if((nrp == (portals.size() + 1)) && (first == false)){ | ~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:78:23: warning: unused variable 'cautat' [-Wunused-variable] 78 | int i, retval = -1, cautat; | ^~~~~~