Compilare: user.cpp: In function ‘int main()’: user.cpp:101:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<gresit.size();i++) ^ user.cpp:11:33: warning: unused variable ‘xc’ [-Wunused-variable] int i,j,n,m,k,t,xa,ya,xb,yb,xc,yc,b,tot,unu,bun=0; ^ user.cpp:11:36: warning: unused variable ‘yc’ [-Wunused-variable] int i,j,n,m,k,t,xa,ya,xb,yb,xc,yc,b,tot,unu,bun=0; ^