Compilare: main.cpp: In function 'void dfs(int)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[c].size();i++) ~^~~~~~~~~~~~ main.cpp:111:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[1].size();i++) ~^~~~~~~~~~~~ main.cpp:151:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[c].size();i++) ~^~~~~~~~~~~~