complete 9655.kt 25331.kt 32189.kt

2025-07-18 22:09:07 +09:00
parent 5279ccf5b6
commit 75f6131331
3 changed files with 244 additions and 0 deletions
--- a/storage/zeta/kt/completed/32189.kt
+++ b/storage/zeta/kt/completed/32189.kt
@@ -0,0 +1,61 @@
+import kotlin.math.max
+import kotlin.math.min
+
+fun maxSplitDiscordance(s: String): Int {
+    val n = s.length
+    val dp = IntArray((n + 1) * (n + 1))
+
+    fun getLCS(i: Int, j: Int): Int { // where i and j means string index
+        return dp[(i + 1) * (n + 1) + (j + 1)]
+    }
+
+    fun setLCS(i: Int, j: Int, v: Int): Int {
+        dp[(i + 1) * (n + 1) + (j + 1)] = v
+        return v
+    }
+
+    var maxDiscordance = 0
+    var lcs: Int
+    val candidate = if (n % 2 == 0) {
+        listOf(n / 2)
+    } else {
+        listOf(n / 2, n / 2 + 1)
+    }
+    for (splitLoc in candidate) {
+        lcs = 0
+        for (x in 0 until splitLoc) {
+            setLCS(x, splitLoc - 1, 0)
+        }
+
+
+        for (i in 0 until splitLoc) {
+            for (j in splitLoc until n) {
+
+                if (s[i] == s[j]) {
+                    lcs = max(setLCS(i, j, getLCS(i - 1, j - 1) + 1), lcs)
+                } else {
+                    lcs = max(
+                        setLCS(
+                            i, j, max(
+                                getLCS(i, j - 1),
+                                getLCS(i - 1, j)
+                            )
+                        ),
+                        lcs
+                    )
+                }
+            }
+        }
+
+        maxDiscordance = max(maxDiscordance, min(splitLoc, n - splitLoc) - lcs)
+    }
+
+    return maxDiscordance
+
+}
+
+fun main() {
+    val s = readln()
+
+    println(maxSplitDiscordance(s))
+}