#include <stdio.h>
int main() {
	int a, b, c;
	scanf("%d", &a);
	scanf("%d", &b);
	scanf("%d", &c);
	if (a > 0 && b > 0 && c > 0 && a < b + c && b < a + c && c < a + b) {
	    if (a == b && b == c) printf("%s", "Triangulo equilatero.");
	    else printf("%s", (a == b || b == c || c == a) ? "Triangulo isosceles." : "Triangulo escaleno.");
	} else printf("Nao e possivel formar um triangulo."); 
}
 
//https://pt.stackoverflow.com/q/339064/101

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

MwozCjMK

3
3
3