Beginning

AtCoder

IDkeyence2019_a

Time2000ms

Memory256MB

Difficulty—

You are given four digits $N_1, N_2, N_3$ and $N_4$. Determine if these can be arranged into the sequence of digits "$1974$". ## Constraints * $0 \leq N_1, N_2, N_3, N_4 \leq 9$ * $N_1, N_2, N_3$ and $N_4$ are integers. ## Input Input is given from Standard Input in the following format: $N_1$ $N_2$ $N_3$ $N_4$ [samples]

Samples

Input #1

1 7 9 4

Output #1

YES

We can get $1974$ by swapping $N_2$ and $N_3$.

Input #2

1 9 7 4

Output #2

YES

We already have $1974$ before doing anything.

Input #3

1 2 9 1

Output #3

NO

Input #4

4 9 0 8

Output #4

NO

API Response (JSON)

{
  "problem": {
    "name": "Beginning",
    "description": {
      "content": "You are given four digits $N_1, N_2, N_3$ and $N_4$. Determine if these can be arranged into the sequence of digits \"$1974$\".",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "keyence2019_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You are given four digits $N_1, N_2, N_3$ and $N_4$. Determine if these can be arranged into the sequence of digits \"$1974$\".\n\n## Constraints\n\n*   $0 \\leq N_1, N_2, N_3, N_4 \\leq 9$\n*   $N_1, N_2, N_3...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments