Determinant

AtCoder

IDabc184_a

Time2000ms

Memory256MB

Difficulty—

Given is a $2 \times 2$ matrix $A = \begin{bmatrix} a & b \\ c & d \end{bmatrix}$. The determinant of $A$ can be found as $ad-bc$. Find it. ## Constraints * All values in input are integers. * $-100 \le a, b, c, d \le 100$ ## Input Input is given from Standard Input in the following format: $a$ $b$ $c$ $d$ [samples]

Samples

Input #1

1 2
3 4

Output #1

\-2

The determinant of $\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}$ is $1 \times 4 - 2 \times 3 = -2$.

Input #2

0 -1
1 0

Output #2

Input #3

100 100
100 100

Output #3

API Response (JSON)

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    "name": "Determinant",
    "description": {
      "content": "Given is a $2 \\times 2$ matrix $A = \\begin{bmatrix} a & b \\\\ c & d \\end{bmatrix}$.   The determinant of $A$ can be found as $ad-bc$.   Find it.",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc184_a"
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  "statements": [
    {
      "statement_type": "Markdown",
      "content": "Given is a $2 \\times 2$ matrix $A = \\begin{bmatrix} a & b \\\\ c & d \\end{bmatrix}$.  \nThe determinant of $A$ can be found as $ad-bc$.  \nFind it.\n\n## Constraints\n\n*   All values in input are integers.\n*...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

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