var o:array[1..5] of integer;
i,s,n:integer;
sr : real;
begin
s:=0;
n:=5;
for i:=1 to 5 do
readln(o[i]);
s:=s+o[i];
end;
sr:=s/n;
end.
var o:array[1..5] of integer;
i,s,n:integer;
sr : real;
begin
s:=0;
n:=5;
for i:=1 to 5 do
begin
readln(o[i]);
s:=s+o[i];
end;
sr:=s/n;
end.