33237

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
33237	奚晨瑞	[在线测评解答教程] 求和	C++	Wrong Answer	0 MS	252 KB	109	2023-12-08 15:27:13

#include<iostream> using namespace std; int main() { int n; cin>>n; cout<<n*(n+1)/2; return 0; }