题解 | #计算字符串的编辑距离#

import java.util.Scanner

fun main(args: Array<String>) {
fun min(a: Int, b: Int) = Math.min(a, b)
    val read = Scanner(System.`in`)
    val res1 = read.nextLine()
    val res2 = read.nextLine()
    val dp = Array(res1.length + 1) { index1 ->
        Array(res2.length + 1) {
            when {
                index1 == 0 -> it
                it == 0 -> index1
                else -> 0
            }
        }
    }

    for (i in 1..res1.length) {
        for (j in 1..res2.length) {
            if (res1[i-1] == res2[j-1]) {
                dp[i][j] = dp[i - 1][j - 1]
            } else {
                dp[i][j] = min(min(dp[i - 1][j - 1] + 1, dp[i - 1][j] + 1), dp[i][j - 1] + 1)
            }
        }
    }
    println(dp[res1.length][res2.length])
}