755

AtCoder

IDabc114_c

Time2000ms

Memory256MB

Difficulty—

You are given an integer $N$. Among the integers between $1$ and $N$ (inclusive), how many _Shichi-Go-San numbers_ (literally "Seven-Five-Three numbers") are there? Here, a Shichi-Go-San number is a positive integer that satisfies the following condition: * When the number is written in base ten, each of the digits `7`, `5` and `3` appears at least once, and the other digits never appear. ## Constraints * $1 \leq N < 10^9$ * $N$ is an integer. ## Input Input is given from Standard Input in the following format: $N$ [samples]

Samples

Input #1

Output #1

4

There are four Shichi-Go-San numbers not greater than $575$: $357, 375, 537$ and $573$.

Input #2

Output #2

13

There are $13$ Shichi-Go-San numbers not greater than $3600$: the above four numbers, $735, 753, 3357, 3375, 3537, 3557, 3573, 3575$ and $3577$.

Input #3

999999999

Output #3

API Response (JSON)

{
  "problem": {
    "name": "755",
    "description": {
      "content": "You are given an integer $N$. Among the integers between $1$ and $N$ (inclusive), how many _Shichi-Go-San numbers_ (literally \"Seven-Five-Three numbers\") are there? Here, a Shichi-Go-San number is a p",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc114_c"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You are given an integer $N$. Among the integers between $1$ and $N$ (inclusive), how many _Shichi-Go-San numbers_ (literally \"Seven-Five-Three numbers\") are there?\nHere, a Shichi-Go-San number is a p...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments