B - ISU

Time Limit: 2 sec / Memory Limit: 256 MB

### 問題文

X センチメートルの椅子があります。 この椅子に座りたい人がたくさんおり，人は椅子に座ると必ず Y センチメートルの幅を使って座ります。

### 制約

• 入力は全て整数
• 1 \leq X, Y, Z \leq 10^5
• Y+2Z \leq X

X Y Z

13 3 1

3

12 3 1

2

100000 1 1

49999

64146 123 456

110

64145 123 456

### 出力例 5

109

Score : 200 points

### Problem Statement

We have a long seat of width X centimeters. There are many people who wants to sit here. A person sitting on the seat will always occupy an interval of length Y centimeters.

We would like to seat as many people as possible, but they are all very shy, and there must be a gap of length at least Z centimeters between two people, and between the end of the seat and a person.

At most how many people can sit on the seat?

### Constraints

• All input values are integers.
• 1 \leq X, Y, Z \leq 10^5
• Y+2Z \leq X

### Input

Input is given from Standard Input in the following format:

X Y Z

### Output

Print the answer.

13 3 1

### Sample Output 1

3

There is just enough room for three, as shown below:

Figure

12 3 1

2

100000 1 1

49999

64146 123 456

110

64145 123 456

109