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t;m;i;j;f(l,n)int*l;{for(m=n,i=1;i++<-~n/2;l[m-=2]=t)for(t=*l,j=0;j<m-2;)l[j++]=l[j+1];}
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Inputs a pointer to the array and its length and milks the array in place.
