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Cod sursa(job #583353)
program euclid2;
var m1,m2:longint; n,i:integer; f1,f2:text;
function euclid(n,m:longint):integer;
begin
if n=0 then euclid:=m else
euclid:=euclid(m mod n,n)
end;
begin
assign(f1,'euclid2.in');
reset(f1);
readln(f1,n);
assign(f2,'euclid2.out');
rewrite(f2);
for i:=1 to n do
begin
read(f1,m1); read(f1,m2);
writeln(f2,euclid(m1,m2));
end;
close(f1);
close(f2);
end.