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Problems > Two Equal Piles

Two Equal Piles

Difficulty: 1600 2000 ms 128 MB

dp

Can the multiset be split into two piles with equal sums?

Input: the first line has N; the second line has N positive integers.

Output: YES or NO.

Constraints:

  • 1 ≤ N ≤ 100
  • 1 ≤ ai ≤ 100

Sample Tests

Input 1
4
1 5 11 7
Output 1
YES
Input 2
3
1 2 5
Output 2
NO

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