题解 | #牛牛学数列4#
牛牛学数列4
https://www.nowcoder.com/practice/586b114f52034688879342ba45779081
#include <iostream>
using namespace std;
int main() {
int a,sum=0,temp=0;
cin>>a;
for(int i=1;i<=a;i++)
{
for(int j=1;j<=i;j++)
sum=j+sum;
}
cout<<sum;
}
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