Array Division

TimeLimit:2000MS  MemoryLimit:256MB
64-bit integer IO format:%I64d
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Problem Description

Vasya has an array a consisting of positive integer numbers. Vasya wants to divide this array into two non-empty consecutive parts (the prefix and the suffix) so that the sum of all elements in the first part equals to the sum of elements in the second part. It is not always possible, so Vasya will move some element before dividing the array (Vasya will erase some element and insert it into an arbitrary position).

Inserting an element in the same position he was erased from is also considered moving.

Can Vasya divide the array after choosing the right element to move and its new position?

Input

The first line contains single integer n (1 ≤ n ≤ 100000) — the size of the array.

The second line contains n integers a1, a2... an (1 ≤ ai ≤ 109) — the elements of the array.

Output

Print YES if Vasya can divide the array after moving one element. Otherwise print NO.

SampleInput 1
3
1 3 2
SampleOutput 1
YES
SampleInput 2
5
1 2 3 4 5
SampleOutput 2
NO
SampleInput 3
5
2 2 3 4 5
SampleOutput 3
YES
Note

In the first example Vasya can move the second element to the end of the array.

In the second example no move can make the division possible.

In the third example Vasya can move the fourth element by one position to the left.

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题目统计信息详细
总AC数9
通过人数7
尝试人数12
总提交量28
AC率25.00%
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