NarrowRectanglesEasy

AtCoder

IDabc056_b

Time2000ms

Memory256MB

Difficulty—

AtCoDeer the deer found two rectangles lying on the table, each with height $1$ and width $W$. If we consider the surface of the desk as a two-dimensional plane, the first rectangle covers the vertical range of $[0,1]$ and the horizontal range of $[a,a+W]$, and the second rectangle covers the vertical range of $[1,2]$ and the horizontal range of $[b,b+W]$, as shown in the following figure: ![image](https://atcoder.jp/img/abc056/5c3a0ed9a07aa0992011c11ffbc9441b.png) AtCoDeer will move the second rectangle horizontally so that it connects with the first rectangle. Find the minimum distance it needs to be moved. ## Constraints * All input values are integers. * $1≤W≤10^5$ * $1≤a,b≤10^5$ ## Input The input is given from Standard Input in the following format: $W$ $a$ $b$ [samples]

Samples

Input #1

3 2 6

Output #1

1

This input corresponds to the figure in the statement. In this case, the second rectangle should be moved to the left by a distance of $1$.

Input #2

3 1 3

Output #2

0

The rectangles are already connected, and thus no move is needed.

Input #3

5 10 1

Output #3

API Response (JSON)

{
  "problem": {
    "name": "NarrowRectanglesEasy",
    "description": {
      "content": "AtCoDeer the deer found two rectangles lying on the table, each with height $1$ and width $W$. If we consider the surface of the desk as a two-dimensional plane, the first rectangle covers the vertica",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc056_b"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "AtCoDeer the deer found two rectangles lying on the table, each with height $1$ and width $W$. If we consider the surface of the desk as a two-dimensional plane, the first rectangle covers the vertica...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments