import java.io.File

fun main() {
    print("Enter a: "); val a = readln().toInt()
    print("Enter b: "); val b = readln().toInt()

    // Create matrix
    var matrix: Array<Array<Int>> = Array(2) { Array(2) {0} }
    matrix[0][0] = a ; matrix[1][0] = b
    matrix[0][1] = a + 1; matrix[1][1] = b + 1

    // Make strings
    var str1: String = "${matrix[0][0]} ${matrix[0][1]}"
    var str2: String = "${matrix[1][0]} ${matrix[1][1]}"
    
    // Write result
    val file = File("file")
    file.writeText("""
        $str1
        $str2
    """.trimIndent())

    // Read result
    var new_matrix: Array<Array<Int>> = Array(2) { Array(2) {0} }

    val lines: List<String> = file.readLines()
    var first = true
    for (i in lines) {
        if (first) {
            // Convert List<String> -> List<Int> -> Array<Int>
            new_matrix[0] = i.split(" ").map { it.toInt() }.toTypedArray()
            first = false
        }
        else {
            new_matrix[1] = i.split(" ").map { it.toInt() }.toTypedArray()
        }
    }

    // Get output
    println("""
        Original matrix:
        ${matrix[0][0]} ${matrix[0][1]}
        ${matrix[1][0]} ${matrix[1][1]}
        
        Readed matrix:
        ${new_matrix[0][0]} ${new_matrix[0][1]}
        ${new_matrix[1][0]} ${new_matrix[1][1]}
    """.trimIndent())

}