37211

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
37211	张予馨	[在线测评解答教程] 求和	C++	Wrong Answer	1 MS	248 KB	108	2024-01-19 16:12:44

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