Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[x].size(); i++) ^ user.cpp: In function ‘void dfst(int)’: user.cpp:61:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gt[x].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:70:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0; j<ctc[i].size(); j++) ^