10469

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
10469	张博涵	[在线测评解答教程] 求和	C++	Wrong Answer	0 MS	248 KB	143	2023-02-25 13:06:01

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