101840: [AtCoder]ABC184 A - Determinant
Memory Limit:256 MB
Time Limit:2 S
Judge Style:Text Compare
Creator:
Submit:1
Solved:0
Description
Score : $100$ points
Problem Statement
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:
$a$ $b$ $c$ $d$
Output
Print the answer as an integer.
Sample Input 1
1 2 3 4
Sample Output 1
-2
The determinant of $\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}$ is $1 \times 4 - 2 \times 3 = -2$.
Sample Input 2
0 -1 1 0
Sample Output 2
1
Sample Input 3
100 100 100 100
Sample Output 3
0