program tamgiac;
var a,b,c: longint;
begin write('Nhap canh a= ');
readln(a);
write('Nhap canh b= ');
readln(b);
write('Nhap canh c= ');
readln(c);
if (a>b+c) or (b>a+c) or (c>a+b)
then writeln('Day khong phai la ba canh tam giac')
else if (a=b) or(b=c) or (a=c)
then writeln('Day la tam giac can')
if (a=b) and (b=c)
then writeln('Day la tam giac dau')
else if (sqr(a)=sqr(b)+sqr(c)) or (sqr(b)=sqr(c)+sqr(a)) or (sqr(c)=sqr(a)+sqr(b))
then writeln('Day la tam giac vuong')
else writeln('Day la tam giac thuong');
readln
end.