3335

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
3335	OscarWLY	求和	C++	Accepted	0 MS	244 KB	156	2023-01-01 15:34:54

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int ans=0; for(int i=1;i<=n;i+=2) ans+=i; cout<<ans; return 0; }