text: #include <stdio.h>
  
  int main()
  {
  	double greatest,greatest2,greatest3,a,b,c,x,y,z;
  	int check;
  	scanf("%lf%lf%lf",&a,&b,&c);
  
  	greatest=a;
  	check=1;
  	if(a<b || a<c){
  	if(b>c){
  	greatest=b;
  	check=2;
  	}
  	else{
  	greatest=c;
  	check=3;
  	}
  	}
  
  	if(check==1){
  	if(b>c){
  	greatest2=b;
  	greatest3=c;
  	}
  	else{
  	greatest2=c;
  	greatest3=b;
  	}
  	}
  
  	else if(check==2){
  	if(a>c){
  	greatest2=a;
  	greatest3=c;
  	}
  	else{
  	greatest2=c;
  	greatest3=a;
  	}
  	}
  	else{
  	if(a>b){
  	greatest2=a;
  	greatest3=b;
  	}
  	else{
  	greatest2=b;
  	greatest3=a;
  	}
  	}
  	//printf("%lf %lf %lf",greatest,greatest2,greatest3);
  
  	a=greatest;
  	b=greatest2;
  	c=greatest3;
  
  	x=a*a;
  	y=b*b;
  	z=c*c;
  
  	if(a>=(b+c)){
  	printf("NAO FORMA TRIANGULO\n");
  	}
  	else {
  	if(x==(y+z)){
  	printf("TRIANGULO RETANGULO\n");
  	}
  	if(x>(y+z)){
  	printf("TRIANGULO OBTUSANGULO\n");
  	}
  	if(x<(y+z)){
  	printf("TRIANGULO ACUTANGULO\n");
  	}
  	if(a==b && a==c && b==c){
  	printf("TRIANGULO EQUILATERO\n");
  	}
  	else if((a==b && (a!=c && b!=c)) || (b==c && (b!=a && c!=a)) || (a==c && (a!=b && c!=b))){
  	printf("TRIANGULO ISOSCELES\n");
  	}
  	}
  return 0;
  }
  