program Perevirka_trytnyka;
{$APPTYPE CONSOLE}
const k=0.5;
var a,b,c:integer; h:real;
f1,f2:text;
begin
assign(f1,'input.txt');
reset(f1);
readln(f1,a);
readln(f1,b);
readln(f1,c);
assign(f2,'output.txt');
rewrite(f2);
if (a+b>c) and (a+c>b) and(c+b>a) then begin
writeln('Trykutnyk isnue') else writeln('Ce ne trykutnyk');
end;
close(f1);
close(f2);
end.