## Mock CCC '23 Contest 1 J3 - Pairing Gifts

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Points: 5 (partial)
Time limit: 1.0s
Memory limit: 512M

Author:
Problem type

Tommy bought gifts for his friends, but he didn't get to give his gifts to them!

Tommy bought Christmas gifts and New Year's gifts, with the -th Christmas gift costing and the -th New Year's gift costing . Strangely, his gifts can be mixed and matched freely.

He wants to make as many perfect bundles as possible! A perfect bundle is one in which there is exactly one Christmas gift, one New Year's gift, (he must be fair), and where the gift pair is interesting. Tommy considers a gift pair interesting if (since gifts that are too close together in his list are too similar).

Unfortunately, it might not be possible to give all his friends perfect bundles. Can you figure out how many of his friends can get perfect bundles?

#### Input Specification

The first line contains three integers, separated by a single space: , , .

The next line of input contains integers, separated by space, representing .

The last line of input contains integers, separated by space, representing .

It is guaranteed that all are distinct and all are distinct.

The following table shows how the available 15 marks are distributed.

marks
marksNone
marksNone

#### Output Specification

Output a single integer, the maximum number of perfect bundles.

#### Sample Input 1

5 2 8
1 2 3 4 5
6 5 7 4 2

#### Output for Sample Input 1

1

#### Explanation of Output for Sample Input 1

The only possible perfect bundle he can make is .

#### Sample Input 2

5 1 8
1 3 5 6 2
3 2 6 5 7

#### Output for Sample Input 2

5

#### Explanation of Output for Sample Input 2

He can make five perfect bundles: with , with , with , with , and with .