program triangle;
uses crt, math;
var
a,b,c: real;
biggest: real;
ttype: real;
begin
write('a = ');
readln(a);

write('b = ');
readln(b);

write('c = ');
readln(c);

biggest := max(c, max(a,b));

if (biggest = a) then
        begin
            ttype := a*a - (b*b + c*c);
        end;
if (biggest = b) then
        begin
           ttype := b*b - (a*a + c*c);
        end;

if (biggest = c) then
        begin
                ttype := c*c - (a*a + b*b);
        end;

if (ttype = 0) then writeln('Triangle has 90 degrees angle.');
if (ttype > 0) then writeln('Triangle has dumb-angle.');
if (ttype < 0) then writeln('Triangle is sharp-angled.');
readln;

end.