Run error in all TEST Cases

#1
#2

@jayyp35,

 if(n1>n2) {
            int d = n1-n2;
            while(d>0) {
                l1 = l1.next;
            }
        } else if(n1>n2) {
            int d = n1-n2;
            while(d>0) {
                l1 = l1.next;
            }
        }

You have written the same condition twice, hence the error. Please correct it.