五

1. #include<stdio.h>
3. int main()
4. {
5.     int num,n,total,x;
6.     scanf("%d%d",&num,&x);
7.     n=num-x;
8.     total=n;
9.     while(n<=num){
10.         printf("%4d    %4d/n",n,total);
11.         n++;
12.         total=n+total;
13.     }
14.     return 0;
15. }