Compilare: main.cpp: In function 'void bfs(int)': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:57:20: warning: 'mj' may be used uninitialized in this function [-Wmaybe-uninitialized] extra[mj]++; ^ main.cpp:56:20: warning: 'mi' may be used uninitialized in this function [-Wmaybe-uninitialized] extra[mi]++; ^