A - Divisibility

A - Divisibility

Time Limit:1000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u

Submit

Status

Description

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.

Input

The only line contains three space-separated integers k, a and b (1 ≤ k ≤ 1018; - 1018 ≤ a ≤ b ≤ 1018).

Output

Print the required number.

Sample Input

Input

1 1 10

Output

10

Input

2 -4 4

Output

5

`这里写代码片`#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;

int main()
{
__int64 k,a,b;   //数组最多开到9位数
while(cin>>k>>a>>b)
{
if(a<=0&&b>=0)
{
cout<<-a/k+b/k+1<<endl;//c语言与数学的算术不同 加减乘除都不同 所以最好别合并
}
else if(a>0)
{
cout<<b/k-(a-1)/k<<endl;
}
else if(b<0)//没考虑到
{
cout<<-a/k-(-b-1)/k<<endl;
}
}
return 0;
}

“`