3796

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
3796	slx	[在线测评解答教程] 求和	C++	Accepted	1 MS	256 KB	127	2023-01-11 08:56:00

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