77000

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
77000	sh25_zhangzh	分苹果	C++	Accepted	0 MS	256 KB	152	2025-12-20 21:14:41

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int s=0; for(int i=1;i<=n;i++) { s+=i; } printf("%d",s); }