paren ekv

#include <stdio.h>
#include <stdlib.h>

int main()
{
  int m,n,i=0,i1=0,s,s1;
  int mnozac1=100;
  int mnozac2=10;
  int broj;
  int z=0;
  int cuvaj;
  int k=1;
  int prom;
  int k1=10;
  scanf("%d %d",&m,&n);
  if (m<n)
{
    prom=m;
    m=n;
    n=prom;
}
    int zx=n;
 cuvaj=m;

  if(n==0 || n<0 || m==0 || m<0)
  {
      printf("Invalid input");
  }
  else
  {
     while(m>0)
     {
         m=m/10;
         i++;
     }

     for(s=1;s<=i;s++)
     {
       broj=cuvaj%mnozac1/mnozac2;

zx=n/k%10;
       if(broj==zx)
       {
            z++;
            mnozac1*=100;
            mnozac2*=100;
            k=k*10;
       }

            else break;

     }
if(z>(s/2))
  {
      printf("PAREN");

  }
  else printf("NE");
  }

    return 0;
}