// Input: nothing for default test cases or // integer between 0 to 8. // Created for this challenge: // https://www.sololearn.com/post/123051 // Easy Pattern // I figured I would make a pattern even // beginners could handle. Trying to express // in words may leave you confused so look // at the examples for clarification. // Read a number 0 to 8. Make a pattern using // the following open & close groupings: (), // <>, [], and {}. You may pick your own order // of the four groups, but that sequence must // be maintained consistantly. The first line // outputs as many of the groups as requested // (repeating them for more than 4). The first // column also lists the same sequence of // groups for the requested lines. The rest of // the field continues the pattern from the // starting point of the first line and column. // For example, zero might output (must output // something): // none // Four could get: // ()<>[]{} // <>[]{}() // []{}()<> // {}()<>[] // Eight could get: // ()<>[]{}()<>[]{} // <>[]{}()<>[]{}() // []{}()<>[]{}()<> // {}()<>[]{}()<>[] // ()<>[]{}()<>[]{} // <>[]{}()<>[]{}() // []{}()<>[]{}()<> // {}()<>[]{}()<>[] // Function to process one pattern. fun process(required: Int) { // Display a header for the pattern so // you know what is coming and zero has // an output, val count = listOf("Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight")[required] println("Pattern for $count:") // For each line in the requested pattern, // display it. for (line in 1..required) { // For each column in the requested pattern, // figure out which group it needs and // display it. for (column in 1..required) print( when ((line+column)%4) { 0 -> "[]" 1 -> "{}" 2 -> "()" else -> "<>" }) // when // Finish off the line. println() } // for // Display an empty line so our default test // cases get separated. println() } // process // Main function for this challenge. fun main(args: Array) { // Try reading an integer between 0 and 8 // causing an exception on error. Process // the requested pattern. try { val test = readLine()!!.toInt() if (test !in 0..8) throw IllegalArgumentException( "Bad input!") process(test) // On exception, complain and process the // test cases patterns. } catch (error: Throwable) { println("Bad input using defaults!") for (test in listOf(0, 2, 6, 8)) process(test) } // try } // main

easy ch