Compilare: main.cpp: In function 'void dfsa(int)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<veca[node].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfsb(int)': main.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vecb[node].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:101:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciclua[p1[i].idx].size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:105:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciclub[p2[i].idx].size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:116:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<b.size();i++) ~^~~~~~~~~ main.cpp:120:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++) ~^~~~~~~~~ main.cpp:149:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++) cout<<a[i]<<" "<<b[i]<<'\n'; ~^~~~~~~~~