Submission #723636

#	Time	Username	Problem	Language	Result	Execution time	Memory
723636		MurotY	Hacker (BOI15_hac)	C++14	20 / 100	1096 ms	340 KiB

hac

#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define ull unsigned long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
#define sz size()
using namespace std;
const double pi = 2 * acos(0.0);
const ll N=1e6+7, M=998244353;

ll a[N], pr[N];
void solve()
{
	int n;
	cin >> n;
	for (int i=0;i<n;i++) {
	     cin >> a[i];
		pr[i]=pr[max(0, i-1)]+a[i];
	}
	ll ans=0;
	for (int i=0;i<n;i++){
		int res=(n+1)/2;
		ll mn=1e18;
		for (int j=0;j<res;j++){
			
			int l=(i-1+n) % n;
			ll sum=0;
			for (int pos=0;pos<j;pos++){
				sum+=a[l];
				l=(l-1+n) % n;
			}
			l=i;
			for (int pos=0;pos<res-j;pos++){
				sum+=a[l];
				l=(l+1) % n;
			}
			mn=min(mn, sum);
		}
		ans=max(ans, mn);
	}
	cout << ans;
	return ;
}
int main(){
	ios;
	int t=1;	
//	cin >> t;
	while (t--){ 
	    solve();
	    cout << "\n";
	}
	return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 40