#include<stdio.h>
int main()
{
double a1,b1,c1,a,b,c;
scanf("%lf %lf %lf",&a1,&b1,&c1);
if(a1==b1 && a1<c1){
a=c1,b=b1,c=a1;
}
else if(a1==c1 && a1<b1){
a=b1,b=a1,c=c1;
}
else if(c1==b1 && a1>c1){
a=a1;
b=b1;
c=c1;
}
else if(a1==b1 && a1==c1){
a=a1,b=b1,c=c1;
}
else if(a1==c1 && a1>b1){
a=a1,b=b1,c=c1;
}
else if(a1==b1 && a1>c1){
a=a1,b=b1,c=c1;
}
else if(b1==c1 && b1>a1){
a=b1,b=a1,c=c1;
}
else if(a1>c1 && a1>b1){
a=a1;
b=b1;
c=c1;
}
else if(a1<b1 && b1>c1){
a=b1;
b=a1;
c=c1;
}
else if(c1>b1 && c1>a1){
a=c1;
b=b1;
c=a1;
}
if(a>=b+c){
printf("NAO FORMA TRIANGULO\n");}
else if((a*a)==((b*b)+(c*c))){
printf("TRIANGULO RETANGULO\n");}
else if((a*a)>((b*b)+(c*c))){
printf("TRIANGULO OBTUSANGULO\n");}
else if((a*a)<((b*b)+(c*c))){
printf("TRIANGULO ACUTANGULO\n");}
if(a==b && a==c){
printf("TRIANGULO EQUILATERO\n");}
if((a == b && c!= a ) || (b == c && a!= b) || (c == a && b!=c ))
printf("TRIANGULO ISOSCELES\n");
return 0;
}
int main()
{
double a1,b1,c1,a,b,c;
scanf("%lf %lf %lf",&a1,&b1,&c1);
if(a1==b1 && a1<c1){
a=c1,b=b1,c=a1;
}
else if(a1==c1 && a1<b1){
a=b1,b=a1,c=c1;
}
else if(c1==b1 && a1>c1){
a=a1;
b=b1;
c=c1;
}
else if(a1==b1 && a1==c1){
a=a1,b=b1,c=c1;
}
else if(a1==c1 && a1>b1){
a=a1,b=b1,c=c1;
}
else if(a1==b1 && a1>c1){
a=a1,b=b1,c=c1;
}
else if(b1==c1 && b1>a1){
a=b1,b=a1,c=c1;
}
else if(a1>c1 && a1>b1){
a=a1;
b=b1;
c=c1;
}
else if(a1<b1 && b1>c1){
a=b1;
b=a1;
c=c1;
}
else if(c1>b1 && c1>a1){
a=c1;
b=b1;
c=a1;
}
if(a>=b+c){
printf("NAO FORMA TRIANGULO\n");}
else if((a*a)==((b*b)+(c*c))){
printf("TRIANGULO RETANGULO\n");}
else if((a*a)>((b*b)+(c*c))){
printf("TRIANGULO OBTUSANGULO\n");}
else if((a*a)<((b*b)+(c*c))){
printf("TRIANGULO ACUTANGULO\n");}
if(a==b && a==c){
printf("TRIANGULO EQUILATERO\n");}
if((a == b && c!= a ) || (b == c && a!= b) || (c == a && b!=c ))
printf("TRIANGULO ISOSCELES\n");
return 0;
}
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