19791

Run ID	Author	Problem	Lang	Verdict	Score	Time	Memory	Code Length	Submit Time
19791	梅煦洋	数列求和	C++	Accepted	100	0 MS	248 KB	207	2021-05-22 17:44:07

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