Parent send N strings to child and child return the palindromes

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
int main(){
  int pid,a,n,p[2],p2[2],i,len,j,k,flag,n2=0;
  char buffr1[100][100],buffr2[100][100],buf[5];
  printf("Enter the limit:- ");
  scanf("%d",&n);
  a = pipe(p);
  if(a == -1)
  {
     fprintf(stderr, "Pipe Failed.\n");
     return EXIT_FAILURE;
  }
  a = pipe(p2);
   if(a == -1)
   {
     fprintf(stderr, "Pipe Failed.\n");
     return EXIT_FAILURE;
  }
   pid = fork();
   switch(pid){
     case -1:perror("main: fork");
       exit(1);
     case 0: read(p[0],buffr2,sizeof(buffr2));
       printf("In child process (ID: %d)\n", pid);
       for(i=0;i<n;i++){
         len=strlen(buffr2[i]);
         flag=0;
         for(j=0,k=len-1;j<len;j++,k--){
           if(buffr2[i][j]!=buffr2[i][k]){
             flag=1;
             break;
           }
         }
         if(flag==0){
           n2++;
           strcpy(buffr1[n2],buffr2[i]);
         }
       }
       buffr1[0][0]=n2;
       write(p2[1],buffr1,sizeof(buffr1));
       exit(1);
       break;
     default: printf("In parent process (ID: %d)\n", pid);
       for(i=0;i<n;i++){
         printf("Enter the string %d:- ",i+1);
         scanf("%s",buffr1[i]);
       }
       write(p[1],buffr1,sizeof(buffr1));
       waitpid(pid,NULL,0);
       read(p2[0],buffr2,sizeof(buffr2));
       printf("In parent process (ID: %d)\n", pid);
       n=(int) buffr2[0][0];
       for(i=1;i<=n;i++)
         printf("Paliandrome %d:- %s\n",i,buffr2[i]);
       break;
  }
   close(p[0]);
   close(p[1]);
   return 0;
}