Compilare: main.cpp: In function 'void dfs(int)': main.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<lista[node].size();i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Bellman()': main.cpp:51:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<lista[c].size();i++) ~^~~~~~~~~~~~~~~~