Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:16:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<g[nod].size(); i++) ^ user.cpp: In function ‘void euler(int)’: user.cpp:23:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (cr[nod]<g[nod].size()) ^ user.cpp:27:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cr[nod]>=g[nod].size()) break; ^