text: #include<iostream>
  #include"ss.h"
  int main(){
      stack *top = NULL;
      char arr[40] = "mississississippkkaaauaj",*s;
  	s = arr;
      int i = 0,j,k,n,x,v,c;
      pushing(&top,*s);
      s++;
      while(*s!='\0'){
          if(top!=NULL && top->val == *s){
              while(top->val == *s){
                  s++;
              }
              pop(&top);
              continue;
          }
          else{
              pushing(&top,*s);
          }
          s++;
      }
  	displaying(top);
  	return 0;
  }
  