CF597A.Divisibility

普及/提高-

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题目描述

Find the number of $k$ -divisible numbers on the segment $[a,b]$ . In other words you need to find the number of such integer values $x$ that $a<=x<=b$ and $x$ is divisible by $k$ .

输入格式

The only line contains three space-separated integers $k$ , $a$ and $b$ ( $1<=k<=10^{18};-10^{18}<=a<=b<=10^{18}$ ).

输出格式

Print the required number.

输入输出样例

输入#1
```
1 1 10
```
输出#1
```
10
```
输入#2
```
2 -4 4
```
输出#2
```
5
```

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