#include<stdio.h>

int main()
{
   int A[3][4]={{1,2,3,4},{5,6,7,8},{9,10,11,12}};
   int i, j;
   int temp;

   for (i=0;i<3;i++)
   {
     for (j=0;j<(4/2);j++)
       { temp=A[i][j];
         A[i][j]=A[i][4-1-j];
         A[i][4-1-j]=temp;        
       }
   }

   for(i=0;i<3;i++)
   {
     for(j=0;j<4;j++)
       printf("%d ",A[i][j]);   

     printf("\n");  
   }

   return 0;
}