Submission #47074

#	Time	Username	Problem	Language	Result	Execution time	Memory
47074		Bruteforceman	Hacker (BOI15_hac)	C++11	40 / 100	1073 ms	2268 KiB

hac

#include "bits/stdc++.h"
using namespace std;
int n;
int a[500010];
long long p[500010];
const long long inf = 1e17;

int main(int argc, char const *argv[])
{
	ios_base :: sync_with_stdio (false);
	cin.tie (0);
	cin >> n;
	for(int i = 0; i < n; i++) {
		cin >> a[i];
	}
	int move = (n + 1) >> 1;
	long long sum = 0;
	for(int i = 0; i < move; i++) {
		sum += a[i];
	}
	for(int i = 0; i < n; i++) {
		p[i] = sum;
		sum -= a[i];
		sum += a[(i + move) % n];
	}
	long long ans = 0;
	for(int i = 0; i < n; i++) {
		long long opt = inf;
		for(int j = 0; j < move; j++) {
			opt = min(opt, p[(i + j) % n]);
		}
		ans = max(ans, opt);
	}
	cout << ans << endl;
	return 0;
}

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