Train Ticket

AtCoder

IDabc079_c

Time2000ms

Memory256MB

Difficulty—

Sitting in a station waiting room, Joisino is gazing at her train ticket. The ticket is numbered with four digits $A$, $B$, $C$ and $D$ in this order, each between $0$ and $9$ (inclusive). In the formula $A$ $op1$ $B$ $op2$ $C$ $op3$ $D$ $=$ $7$, replace each of the symbols $op1$, $op2$ and $op3$ with `+` or `-` so that the formula holds. The given input guarantees that there is a solution. If there are multiple solutions, any of them will be accepted. ## Constraints * $0≤A,B,C,D≤9$ * All input values are integers. * It is guaranteed that there is a solution. ## Input Input is given from Standard Input in the following format: $ABCD$ [samples]

Samples

Input #1

Output #1

1+2+2+2=7

This is the only valid solution.

Input #2

Output #2

0-2+9+0=7

$0 - 2 + 9 - 0 = 7$ is also a valid solution.

Input #3

Output #3

3+2+4-2=7

API Response (JSON)

{
  "problem": {
    "name": "Train Ticket",
    "description": {
      "content": "Sitting in a station waiting room, Joisino is gazing at her train ticket. The ticket is numbered with four digits $A$, $B$, $C$ and $D$ in this order, each between $0$ and $9$ (inclusive). In the form",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc079_c"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "Sitting in a station waiting room, Joisino is gazing at her train ticket.\nThe ticket is numbered with four digits $A$, $B$, $C$ and $D$ in this order, each between $0$ and $9$ (inclusive).\nIn the form...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments