package main

import java.io.File

fun main() {
    var sum = 0
    File("../input.txt").forEachLine{
        var firstDigit = ""
        var lastDigit = ""

        for (c in it) {
            if (c.isDigit()) {
                lastDigit = c.toString()
                if (firstDigit == "") {
                    firstDigit = c.toString()
                }
            }
        }

        sum += (firstDigit + lastDigit).toInt()
    }
    println(sum)
}