Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gf[nod].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfst(int)': main.cpp:26:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gft[nod].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ~^~~~~~~~~~~~