Compilare: main.cpp: In function 'bool bfs()': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[101].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'bool bfs()': main.cpp:13:36: warning: iteration 5005 invokes undefined behavior [-Waggressive-loop-optimizations] for(int i=0;i<=NMAX;i++) ver[i]=false; ~~~~~~^~~~~~ main.cpp:13:18: note: within this loop for(int i=0;i<=NMAX;i++) ver[i]=false; ~^~~~~~