#include<stdio.h>
void classifyTriangle(int a, int b,int c){
    if (a< 0|| b< 0|| c< 0) {
        printf("Invalid Input\n");
    return;
    }
    else if (a == b && b==c){
        printf("Equilateral\n");
    }
    else if (a == b || b ==c || c==a){
        printf("Isosceles\n");
    }
    else {
        printf("Scalene\n");
    }
}
int main() {
    printf("sample Input1(3 ,4,5):");
    classifyTriangle(3,4,5);
    printf("sample Input 2( 2,2,2):");
    classifyTriangle(2,2,2);
    printf("sample Input 3(5,-1,5):");
    classifyTringle(5,-1,5);
}esle {
    printf("Inv