Compilare: user.cpp: In function ‘void sortt(int)’: user.cpp:15:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ad[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:51:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<ad[i].size();j++) if(maxpath[ad[i][j]]<maxpath[i]+1) maxpath[ad[i][j]]=maxpath[i]+1; ^