Compilare: main.cpp: In function 'void bfs(int)': main.cpp:46:81: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | if(it!=t[x] && (d[it] + d[x] - 1) % 2 == 0 && (d[it] + d[x] - 1 < rez.size() || !rez.size())) | ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~