#include<stdio.h>
void (int a,int b,intc)
{
    if(a<=0||b<=0||c<=0){
        printf("Invalid Input\n");
    }
    else if (a==b&&b==c){
        printf("Equilateral\n");
    }
    else if(a==b||b==c||a==c){
        printf("Isosceles\n");
    }
    else{
        printf("Scalene\n");
    }
}
int main()
{
int a,b,c;
printf("Enter three side of triangle:");
scanf("%d %d %d",&a,&b,&c);
classify triangle(a,b,c);
return 0;
}