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- #include <stdio.h>
- int sole(int n,int *a)
- {
- int ans;
- if(n!=0)
- {
- ans=sole(n-1,a)+*a;
- *a+=n;
- return ans;
- }
- else
- return 1;
- }
- int main(void) {
- int n,a;
- while(~scanf("%d",&n))
- {
- a=1;
- printf("%d\n",sole(n,&a));
- }
- return 0;
- }
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