Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp:25:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<=g[nod].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:22:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^