제출 #47074

#제출 시각아이디문제언어결과실행 시간메모리
47074BruteforcemanHacker (BOI15_hac)C++11
40 / 100
1073 ms2268 KiB
#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; }
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