3319

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
3319	OscarWLY	[在线测评解答教程] 求和	C++	Wrong Answer	0 MS	240 KB	156	2023-01-01 14:53:55

#include<iostream> using namespace std; int main() { int n; cin>>n; long long ans=0; for(int i=1;i<=n;i++) ans+=i; cout<<ans; return 0; }