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# 1035. Uncrossed Lines

We write the integers of `A` and `B` (in the order they are given) on two separate horizontal lines.

Now, we may draw connecting lines: a straight line connecting two numbers `A[i]` and `B[j]` such that:

• `A[i] == B[j]`;
• The line we draw does not intersect any other connecting (non-horizontal) line.

Note that a connecting lines cannot intersect even at the endpoints: each number can only belong to one connecting line.

Return the maximum number of connecting lines we can draw in this way.

Example 1:

```Input: A = [1,4,2], B = [1,2,4]
Output: 2
Explanation: We can draw 2 uncrossed lines as in the diagram.
We cannot draw 3 uncrossed lines, because the line from A[1]=4 to B[2]=4 will intersect the line from A[2]=2 to B[1]=2.
```

Example 2:

```Input: A = [2,5,1,2,5], B = [10,5,2,1,5,2]
Output: 3
```

Example 3:

```Input: A = [1,3,7,1,7,5], B = [1,9,2,5,1]
Output: 2```

Medium

Normal

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