题解 | #牛牛学数列4#
牛牛学数列4
https://ac.nowcoder.com/acm/problem/22159
#include <iostream>
using namespace std;
int main(){
int n;
int sum = 0;
cin>>n;
while(n){
int temp = 0;
for(int i = 1;i<=n;i++){
temp += i;
sum += temp;
}
break;
}
cout<<sum;
return 0;
}
