Compilare: main.cpp: In function 'void dfs(int)': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void que()': main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++){ ~^~~~~~~~~~~~~~