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