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 n = 0; scanf("%d",&n); int sum = 0; int sum1 = 0; int i = 0; for(i = 1;i<=n;i++) { sum+=i; sum1+=sum; } printf("%d",sum1); return 0; }