Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=nr;i++) if(sol[i].size()>maxi) {maxi=sol[i].size();p=i;} ~~~~~~~~~~~~~^~~~~