An Odd Problem

AtCoder

IDaising2020_b

Time2000ms

Memory256MB

Difficulty—

We have $N$ squares assigned the numbers $1,2,3,\ldots,N$. Each square has an integer written on it, and the integer written on Square $i$ is $a_i$. How many squares $i$ satisfy both of the following conditions? * The assigned number, $i$, is odd. * The written integer is odd. ## Constraints * All values in input are integers. * $1 \leq N, a_i \leq 100$ ## Input Input is given from Standard Input in the following format: $N$ $a_1$ $a_2$ $\cdots$ $a_N$ [samples]

Samples

Input #1

5
1 3 4 5 7

Output #1

2

*   Two squares, Square $1$ and $5$, satisfy both of the conditions.
*   For Square $2$ and $4$, the assigned numbers are not odd.
*   For Square $3$, the written integer is not odd.

Input #2

15
13 76 46 15 50 98 93 77 31 43 84 90 6 24 14

Output #2

API Response (JSON)

{
  "problem": {
    "name": "An Odd Problem",
    "description": {
      "content": "We have $N$ squares assigned the numbers $1,2,3,\\ldots,N$. Each square has an integer written on it, and the integer written on Square $i$ is $a_i$. How many squares $i$ satisfy both of the following ",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "aising2020_b"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "We have $N$ squares assigned the numbers $1,2,3,\\ldots,N$. Each square has an integer written on it, and the integer written on Square $i$ is $a_i$.\nHow many squares $i$ satisfy both of the following ...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments