Create 0312-burst-balloons.kt

Author: a93a

kotlin/0312-burst-balloons.kt

@@ -0,0 +1,21 @@
+class Solution {
+    fun maxCoins(nums: IntArray): Int {
+        val newNums = intArrayOf(1) + nums + intArrayOf(1)
+        val cache = Array(newNums.size){ IntArray(newNums.size) }
+        
+        fun dfs(left: Int, right: Int): Int{
+            if(left > right) return 0
+            if(cache[left][right] != 0) return cache[left][right]
+            for(i in left..right){
+                var coins = newNums[left-1] * newNums[i] * newNums[right+1]
+                coins = coins + dfs(left, i-1) + dfs(i+1, right)
+                cache[left][right] = maxOf(cache[left][right], coins)
+            }
+            return cache[left][right]
+        }
+        
+        return dfs(1, newNums.size-2)
+        
+    }
+    
+}