85tps求调#2#13#20错3点🙏🏻

#include<bits/stdc++.h>
using namespace std;
int a[200002];
int p=1;
long long ans=-200000000000000;
long long cnt=-200000000000000;
int main(){
	int n;
	cin>>n;
	for(int i=1;i<=2*n;i++){
		if(p==i-n)break;
		int x;
		if(i<=n){
			cin>>a[i];
		}
		x=a[i-(i-1)/n*n];
		cnt=max(cnt+x,(long long)x);
		if(cnt==(long long)x)p=i;
		ans=max(cnt,ans);
	}
	cout<<ans;
	return 0;
}