TriangleType

#include<stdio.h>
void main(int argc, char const *argv[]){
    int edge1,edge2,edge3;
    printf("input 3 edges:");
    scanf("%d %d %d",&edge1,&edge2,&edge3);
    if(edge1+edge2<edge3||edge1+edge3<edge2||edge2+edge3<edge1){printf("unable to form a");}
    else{
        if(edge1!=edge2&&edge1!=edge3&&edge2!=edge3){printf("unequilateral ");}
        else{
            if(edge1==edge2&&edge2==edge3){printf("equilateral ");}
            if(edge1==edge2||edge1==edge3||edge2==edge3){printf("isosceles ");  }
        }
        printf("triangle");
    }

}