var
a, b, c:real;
begin
write('a = '); readln(a);
write('b = '); readln(b);
write('c = '); readln(c);
if (a + b > c) and
(a + c > b) and
(b + c > a) then
writeln('YES')
else
writeln('NO');
end.
var
a, b, c:real;
begin
write('a = '); readln(a);
write('b = '); readln(b);
write('c = '); readln(c);
if (a + b > c) and
(a + c > b) and
(b + c > a) then
writeln('YES')
else
writeln('NO');
end.