Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();i++){ ~^~~~~~~~~~~~~~~~