#include <stdio.h>
void classifyTriabgle(int a,int b,int c){
    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 n1,n2,n3;
        printf("Enter the lengths of the three sides of triangle(n1 n2 n3):");
        scanf("%d %d %d", &n1, &n2, &n3);
        classifyTriangle(n1,n2,n3);
        return 0;
    
    }