Compilare: user.cpp: In function ‘int main()’: user.cpp:50:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ve[1].size();i++) ~^~~~~~~~~~~~~ user.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ve[varf].size();i++) ~^~~~~~~~~~~~~~~~ user.cpp:33:9: warning: unused variable ‘q’ [-Wunused-variable] int q,n,m,i,x,y,c,varf,dm,vecin,cost=0; ^