题解 | 牛牛学数列4
牛牛学数列4
https://www.nowcoder.com/practice/586b114f52034688879342ba45779081
#include <stdio.h>
int main()
{
int c,i,n,j;
c=0;
i=0;
n=0;
scanf("%d",&n);
j=n;
for(i=1;i<n+1;i++)
{
c=c+j*i;
j--;
}
printf("%d",c);
return 0;
}
