Compilare: main.cpp: In function 'void bfs(int)': main.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); i++) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void bfs2(int)': main.cpp:42:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); i++) { ~~^~~~~~~~~~~~~