Compilare: main.cpp: In function 'void Dfs(int, int)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[node].size();++i) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Pow()': main.cpp:43:19: warning: array subscript is below array bounds [-Warray-bounds] pw[0]=1; pw[-1]=1; ~~~~~^ main.cpp: In function 'int main()': main.cpp:43:19: warning: array subscript is below array bounds [-Warray-bounds] pw[0]=1; pw[-1]=1; ~~~~~^