33473

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
33473	chenyifei	求和	C++	Accepted	0 MS	240 KB	169	2023-12-09 15:19:37

#include<iostream> using namespace std; int main() { int n; cin>>n; int N; if(n%2==1){ N=n; } else{ N=n+1; } cout<<(N+1)*(N+1)/4; return 0; }