42231

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
42231	WZH	求和	C++	Accepted	0 MS	240 KB	161	2024-02-25 09:17:00

#include<bits/stdc++.h> using namespace std; int main() { int n,sum=0,cnt=0; cin>>n; for(int i=1;i<=n;i++){ sum+=i; cnt+=sum; } cout<<cnt; }