Paper cutting - MarisaOJ: Marisa Online Judge
Given a sheet of paper with dimensions $H \times W$. Cut $n$ parallel cuts along the edges of the paper, and determine how many parts the paper is divided into.
### Input
- The first line contains three integers $W$, $H$, and $n$.
- The next $n$ lines each contain four integers $x_1$, $y_1$, $x_2$, $y_2$, indicating a cut from position $(x_1, y_1)$ to $(x_2, y_2)$.
### Output
- Print an integer representing the number of parts the paper is divided into.
### Constraints
- $1 \leq n \leq 10^5$.
- $1 \leq W, H \leq 10^9$.
- $1 \leq x_1 \leq x_2 \leq W$.
- $1 \leq y_1 \leq y_2 \leq H$.
### Example
Input:
```
10 10 5
6 0 6 7
0 6 7 6
2 3 9 3
2 3 2 10
1 9 8 9
```
Output:
```
4
```
Topic
Data structure
DSU
Rating
2300
Source
JOI
Solution (0)
Solution
