PROGRAMMING:LC's Jedi survival
When he was a child, he was fascinated by the survival of the Jedi. He dreamed that one day he would be thrown to an island. He wanted to calculate the area of the whole island.
The simplified title means a map of $$n * n $. There are a total of $$n * n $$grids with an area of $$1 $. The grid number in the upper left corner of the map is $$(1,1) $, and the grid number in the lower right corner is $$(n, n) $. Each grid is marked on the map. If the grid mark bit $$(x, y) $$$$is $$0 $, it means that the area is sea, otherwise it is land.
Now $$LC $$is airdropped to the position of $$(SX, SY) $. He wants to know the area of his island.
Note that there may be more than one island. Just calculate the area of the island where $$LC $$.
###Input format:
The first line gives a positive integer, $$n (1 < = n < = 50) $, indicating that the size of the map is $$n * n$$
The second line gives two positive integers, $$SX, sy $$, indicating the location to which the $$LC $$is airdropped
Next to the $$n $$line, each line gives $$n $$integers. If the integer in row $$I $$and column $$J $$is 0, it means that the position of number $$(I, J) $$is ocean, otherwise it means land.
Ensure that the data is legal and that $$LC $$will not fall into the sea.
###Output format:
Output the area of the island where $$LC $$is located in one row.
###Input example:
```in
six
5 3
0 0 0 1 1 0
1 0 0 1 1 0
0 0 1 0 1 1
1 1 0 1 0 1
0 1 1 1 0 1
1 1 0 1 1 1
```
###Output example:
```out
nineteen
```
answer：If there is no answer, please comment
The simplified title means a map of $$n * n $. There are a total of $$n * n $$grids with an area of $$1 $. The grid number in the upper left corner of the map is $$(1,1) $, and the grid number in the lower right corner is $$(n, n) $. Each grid is marked on the map. If the grid mark bit $$(x, y) $$$$is $$0 $, it means that the area is sea, otherwise it is land.
Now $$LC $$is airdropped to the position of $$(SX, SY) $. He wants to know the area of his island.
Note that there may be more than one island. Just calculate the area of the island where $$LC $$.
###Input format:
The first line gives a positive integer, $$n (1 < = n < = 50) $, indicating that the size of the map is $$n * n$$
The second line gives two positive integers, $$SX, sy $$, indicating the location to which the $$LC $$is airdropped
Next to the $$n $$line, each line gives $$n $$integers. If the integer in row $$I $$and column $$J $$is 0, it means that the position of number $$(I, J) $$is ocean, otherwise it means land.
Ensure that the data is legal and that $$LC $$will not fall into the sea.
###Output format:
Output the area of the island where $$LC $$is located in one row.
###Input example:
```in
six
5 3
0 0 0 1 1 0
1 0 0 1 1 0
0 0 1 0 1 1
1 1 0 1 0 1
0 1 1 1 0 1
1 1 0 1 1 1
```
###Output example:
```out
nineteen
```
answer：If there is no answer, please comment