Between a and b ...

AtCoder

IDabc048_b

Time2000ms

Memory256MB

Difficulty—

You are given nonnegative integers $a$ and $b$ ($a ≤ b$), and a positive integer $x$. Among the integers between $a$ and $b$, inclusive, how many are divisible by $x$? ## Constraints * $0 ≤ a ≤ b ≤ 10^{18}$ * $1 ≤ x ≤ 10^{18}$ ## Input The input is given from Standard Input in the following format: $a$ $b$ $x$ [samples]

Samples

Input #1

4 8 2

Output #1

3

There are three integers between $4$ and $8$, inclusive, that are divisible by $2$: $4$, $6$ and $8$.

Input #2

0 5 1

Output #2

6

There are six integers between $0$ and $5$, inclusive, that are divisible by $1$: $0$, $1$, $2$, $3$, $4$ and $5$.

Input #3

9 9 2

Output #3

0

There are no integer between $9$ and $9$, inclusive, that is divisible by $2$.

Input #4

1 1000000000000000000 3

Output #4

333333333333333333

Watch out for integer overflows.

API Response (JSON)

{
  "problem": {
    "name": "Between a and b ...",
    "description": {
      "content": "You are given nonnegative integers $a$ and $b$ ($a ≤ b$), and a positive integer $x$. Among the integers between $a$ and $b$, inclusive, how many are divisible by $x$?",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc048_b"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You are given nonnegative integers $a$ and $b$ ($a ≤ b$), and a positive integer $x$. Among the integers between $a$ and $b$, inclusive, how many are divisible by $x$?\n\n## Constraints\n\n*   $0 ≤ a ≤ b ...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

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