#include <stdio.h>

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


/*

input:  3 4 5
output: That's a right-angled triangle
        (right)

input:  3.33 4.44 5.55
output: That is not a right angled triangle
        (wrong)

 */