program zadazha1;

{$APPTYPE CONSOLE}

var n,d,m,l:integer;
begin
writeln('wwesty masu Darynky');
readln(d);
n:=d-5;
{--------------------------------}
writeln('wwesty masu zukerok');
readln(m);
if (d+n)=m then
write('masa Darynky i Natalky = masi zukerok')
else
    if (d+n)>m then
write('masa Darynky i Natalky > za masu zukerok, tomu umova zada4i ne wykonuetsa')
else
    if (d+n)<m then
    begin
l:=m-(d+n);
write(l/2:2:1, ' kilogram zukerok dowedtsa zjisty Darunzi i Natalzi dlz zriwnowsshenna');
       end;
readln;
end.