{"raw_statement":[{"iden":"problem statement","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."},{"iden":"constraints","content":"*   All values in input are integers.\n*   $-100 \\le a, b, c, d \\le 100$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$a$ $b$\n$c$ $d$"},{"iden":"sample input 1","content":"1 2\n3 4"},{"iden":"sample output 1","content":"\\-2\n\nThe determinant of $\\begin{bmatrix} 1 & 2 \\\\ 3 & 4 \\end{bmatrix}$ is $1 \\times 4 - 2 \\times 3 = -2$."},{"iden":"sample input 2","content":"0 -1\n1 0"},{"iden":"sample output 2","content":"1"},{"iden":"sample input 3","content":"100 100\n100 100"},{"iden":"sample output 3","content":"0"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}