#include <iostream>
using namespace std;
int main() {
int lado1, lado2, lado3;
bool equilatero, escaleno, isosceles;
cin >> lado1 >> lado2 >> lado3;
equilatero = lado1 == lado2 && lado2 == lado3 && lado3 == lado1;
escaleno = lado1 != lado2 && lado2 != lado3 && lado3 != lado1;
isosceles = (lado1 != lado2 && lado2 == lado3 && lado3 != lado1) ||
(lado1 != lado2 && lado2 != lado3 && lado3 == lado1) ||
(lado1 == lado2 && lado2 != lado3 && lado3 != lado1);
if( equilatero )
cout << "EQUILATERO";
if( escaleno )
cout << "ESCALENO";
if( isosceles )
cout << "ISOCELES";
return 0;
}
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