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Time Limit: 2 s Memory Limit: 1024 MB Total points: 100

#978. 최대 부분 수열

Statistics

수열 $a_{1 \dots n}$에 대하여, $f(a)$를 다음과 같이 정의한다.

$$f(a) = \max_{1 \le l \le r \le n} \sum_{i=l}^{r} a_i$$

수열 $b_{1 \dots n}$이 주어졌을 때, $b_{1 \dots n}$을 재배열하여 $b'_{1 \dots n}$을 만들고 $f(b')$를 최소화해야 한다.

입력

첫 번째 줄에는 정수 $n$ ($1 \le n \le 16$)이 주어진다. 두 번째 줄에는 $n$개의 정수 $a_{1 \dots n}$ ($|a_i| \le 10^5$)이 주어진다.

출력

가능한 최소 $f(b')$를 출력한다.

예제

입력 1

4
1 -1 1 1

출력 1

2

입력 2

6
4 -4 5 -20 6 7

출력 2

9

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