gistfile1.c

#include<stdio.h>
#include<math.h>

// a. find out p=2^15
// b. print the last digit of p

int main()
{
      int ans,i,n,j;
      n=10;
      ans=2;
            for(i=2;i<=15;i++){
                 ans=ans*2;
                ans=ans%10;  // if I want to know the last one digit of the number of the sum of the sequence
            }
            printf("ans :%d",ans);

return 0;
}