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Cod sursa(job #613270)
function hatv(a,b:longint):longint;
begin
if b=0 then hatv:=1
else hatv:=a*hatv(a,b-1);
end;
var f,g:text;
i,n,x:longint;
a:array[1..100]of longint;
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
readln(f,n);
for i:=1 to n do readln(f,a[i]);
x:=0;
for i:=1 to n do begin x:=x+hatv(a[i],i);
writeln(g,x mod 10);
end;
close(f);
close(g);
end.