var n,i:byte;
x,y: real;
max,mix,may,miy:real;
begin
readln(n);
for i:=1 to n do
begin
readln(x,y);
if i=1 then begin
max:=x;mix:=x;may:=y;miy:=y;
end else
begin
if max<x then max:=x;
if mix>x then mix:=x;
if may<y then may:=y;
if miy>y then miy:=y;
end;
end;
writeln("dinh tren trai: (",max,",",miy,") ;");
writeln("dinh duoi phai: (",mix,",",may,") ;");
readln;
end.
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