- Prepare
- Algorithms
- Implementation
- Subarray Division

# Subarray Division

# Subarray Division

Two children, Lily and Ron, want to share a chocolate bar. Each of the squares has an integer on it.

Lily decides to share a contiguous segment of the bar selected such that:

- The length of the segment matches Ron's birth month, and,
- The sum of the integers on the squares is equal to his birth day.

Determine how many ways she can divide the chocolate.

**Example**

Lily wants to find segments summing to Ron's birth day, with a length equalling his birth month, . In this case, there are two segments meeting her criteria: and .

**Function Description**

Complete the *birthday* function in the editor below.

birthday has the following parameter(s):

*int s[n]:*the numbers on each of the squares of chocolate*int d:*Ron's birth day*int m:*Ron's birth month

**Returns**

*int:*the number of ways the bar can be divided

**Input Format**

The first line contains an integer , the number of squares in the chocolate bar.

The second line contains space-separated integers , the numbers on the chocolate squares where .

The third line contains two space-separated integers, and , Ron's birth day and his birth month.

**Constraints**

- , where ()

**Sample Input 0**

```
5
1 2 1 3 2
3 2
```

**Sample Output 0**

```
2
```

**Explanation 0**

Lily wants to give Ron squares summing to . The following two segments meet the criteria:

**Sample Input 1**

```
6
1 1 1 1 1 1
3 2
```

**Sample Output 1**

```
0
```

**Explanation 1**

Lily only wants to give Ron consecutive squares of chocolate whose integers sum to . There are no possible pieces satisfying these constraints:

Thus, we print as our answer.

**Sample Input 2**

```
1
4
4 1
```

**Sample Output 2**

```
1
```

**Explanation 2**

Lily only wants to give Ron square of chocolate with an integer value of . Because the only square of chocolate in the bar satisfies this constraint, we print as our answer.