complete 11735.kt 14254.kt 16293.kt

storage/zeta/kt/completed/14254.kt

@@ -0,0 +1,37 @@
+fun diffStr(s1: String, s2: String) =
+    (s1.toList() zip s2.toList()).count { it.first != it.second }
+
+fun 비밀번호변경을위한최소수정횟수(pwdOld: String, k: Int): Int {
+    val n = pwdOld.length
+
+    if (2 * k <= n) { // <분리> 케이스
+        return diffStr(pwdOld.substring(0, k), pwdOld.substring(n - k))
+    } else {
+        var modify = 0
+        val space = n - k
+        for (i in 0 until space) {
+            var pos = i
+            val cnts = IntArray(26) { 0 }
+
+            while (pos < n) {
+                cnts[pwdOld[pos].code - 'a'.code]++
+                pos += space
+            }
+
+            val maxSent = cnts.withIndex().maxBy { it.value }
+
+            modify += cnts.sum() - maxSent.value
+        }
+        return modify
+    }
+
+}
+
+fun main() = with(System.`in`.bufferedReader()) {
+    val pwdOld = this.readLine().trim()
+    val k = this.readLine().toInt()
+
+    println(
+        비밀번호변경을위한최소수정횟수(pwdOld, k)
+    )
+}