#include<stdio.h>
int mani(){
    int a, b, c;
    printf("Enter the lengths of the three sides (a, b, c: ");
    scanf("%d %d %d", &a, &b, &c);
    if (a<0 || b<0 || c<0){
    printf("Invalide Input\n");
    } else if (a==b && b==c || a==c) {
        printf("Equilateral\n");
    } else if (a==b || b==c) {
        printf("Isosceles\n");
    } else {
        printf("Scale\n");
    }
return 0;
}