program Project4;
{$APPTYPE CONSOLE}
var i,s,a,b:integer;
begin
s:=0;
for i:=10 to 99 do begin
a:=i div 10;
b:=i mod 10;
if (a+b) mod 5=0 then
s:=s+(i*i*i);end;
writeln('Suma kubiv S=',S);
readln;
end.