题解 | 牛牛学数列4
牛牛学数列4
https://www.nowcoder.com/practice/586b114f52034688879342ba45779081
n = int(input()) ans = 0 for i in range(1,n+1): ans += sum(range(1,i+1)) print(ans)
牛牛学数列4
https://www.nowcoder.com/practice/586b114f52034688879342ba45779081
n = int(input()) ans = 0 for i in range(1,n+1): ans += sum(range(1,i+1)) print(ans)
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