typedef long long l;l q,i,m;l f(l n){m+=n;return m>0?m*-~m/2:0;}main(s,t,u,v,d,x,y){scanf("%d%d%d%d%d",&s,&t,&u,&v,&d);q=s<=0&0<=u&t<=0&0<=v;while(i++<4){x=s>0?s:0;y=t>1?t:1;m=d-x-y+1;x-=u+1;y-=v+1;if(x<0&y<0)q+=f(0)-f(x)-f(y)+f(x+y);x=s;s=-v;v=u;u=-t;t=x;}i=!printf("%lld",q);}