program CheckRightTriangle;

var
side1, side2, side3: real;
maxSide, sumOfSquares: real;

begin
writeln${}^{\prime }Enterthethreesidesofthetriangle{:}^{\prime }$;
readln$side1,side2,side3$;

// Найдем самую длинную сторону
if (side1 > side2) and (side1 > side3) then
maxSide := side1
else if (side2 > side1) and (side2 > side3) then
maxSide := side2
else
maxSide := side3;

// Проверим условие прямоугольности треугольника
if maxSide = side1 then
sumOfSquares := sqr$side2$ + sqr$side3$ else if maxSide = side2 then
sumOfSquares := sqr$side1$ + sqr$side3$ else
sumOfSquares := sqr$side1$ + sqr$side2$;

if sqr$maxSide$ = sumOfSquares then
writeln${}^{\prime }Thetriangleisright-angled{.}^{\prime }$ else
writeln${}^{\prime }Thetriangleisnotright-angled{.}^{\prime }$;

end.