/*
 * Correct version!
 */

#include <stdio.h>
#include <math.h>

int main()
{
    double a, b, c;
    scanf("%lg%lg%lg", &a, &b, &c);
    if (fabs(a*a + b*b - c*c) < 1e-10)
        printf("That's a right-angled triangle\n");
    else
        printf("That is not a right-angled triangle\n");
    return 0;
}