Odds of Oddness

AtCoder

IDabc142_a

Time2000ms

Memory256MB

Difficulty—

Given is an integer $N$. Takahashi chooses an integer $a$ from the positive integers not greater than $N$ with equal probability. Find the probability that $a$ is odd. ## Constraints * $1 \leq N \leq 100$ ## Input Input is given from Standard Input in the following format: $N$ [samples]

Samples

Input #1

Output #1

0.5000000000

There are four positive integers not greater than $4$: $1$, $2$, $3$, and $4$. Among them, we have two odd numbers: $1$ and $3$. Thus, the answer is $\frac{2}{4} = 0.5$.

Input #2

Output #2

0.6000000000

Input #3

Output #3

1.0000000000

API Response (JSON)

{
  "problem": {
    "name": "Odds of Oddness",
    "description": {
      "content": "Given is an integer $N$. Takahashi chooses an integer $a$ from the positive integers not greater than $N$ with equal probability. Find the probability that $a$ is odd.",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc142_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "Given is an integer $N$.\nTakahashi chooses an integer $a$ from the positive integers not greater than $N$ with equal probability.\nFind the probability that $a$ is odd.\n\n## Constraints\n\n*   $1 \\leq N \\...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments