gistfile1.scala

package proj_euler

object Problem8 {
    
    lazy val num = "7316717653133062491922511967442" +
    		   "6574742355349194934969835203127" +
    		   "7450632623957831801698480186947" +
    		   "8851843858615607891129494954595" +
    		   "0173795833195285320880551112540" +
    		   "6987471585238630507156932909632" +
    		   "9522744304355766896648950445244" +
    		   "5231617318564030987111217223831" +
    		   "1362229893423380308135336276614" +
    		   "2828064444866452387493035890729" +
    		   "62904915604407723907138105158593" +
    		   "07960866701724271218839987979087" +
    		   "92274921901699720888093776657273" +
    		   "330010533678812202354218097512545" +
    		   "40594752243525849077116705560136048" +
    		   "39586446706324415722155397536978179" +
    		   "778461740649551492908625693219784686" +
    		   "224828397224137565705605749026140797" +
    		   "2968652414535100474821663704844031998" +
    		   "90008895243450658541227588666881164271" +
    		   "71479924442928230863465674813919123162" +
    		   "82458617866458359124566529476545682848" +
    		   "91288314260769004224219022671055626321" +
    		   "11110937054421750694165896040807198403" +
    		   "850962455444362981230987879927244284909" +
    		   "188845801561660979191338754992005240636" +
    		   "8991256071760605886116467109405077541002" +
    		   "25698315520005593572972571636269561882670" +
    		   "428252483600823257530420752963450"
 
 def prod(str : String) : Int ={
     var num = str.toInt
     // Very ugly solution
     var num1 = num / 10000
     var num2 = (num - (num1 * 10000)) / 1000
     var num3 = ((num - (num2 * 1000)) - (num1 * 10000)) / 100
     var num4 = ((num - (num2 * 1000) - (num3 * 100)) - (num1 * 10000)) / 10
     var num5 = ((num - (num2 * 1000) - (num3 * 100)) - (num1 * 10000) - (num4 * 10))
        
     return num1 * num2 * num3 * num4 * num5  
}
    
 def solve() : Int = {
     var nums_list = num.sliding(5).toList
     var max_num = nums_list.map(s => prod(s)).max
     return max_num
    }

}