kk

src/main/java/com/dota/Solution.java

@@ -1,8 +1,8 @@
 package com.dota;
 
-import org.apache.commons.collections4.list.TreeList;
+import java.util.Arrays;
-
 import java.util.HashMap;
+import java.util.HashSet;
 
 public class Solution {
 	// 1423. 可获得的最大点数
@@ -79,4 +79,43 @@ class Solution2 {
 		}
 		return count;
 	}
+}
+
+class Solution3 {
+	public int[] findEvenNumbers(int[] digits) {
+		int[] dp = new int[10];
+		int cnt = 0;
+		for (int i : digits) {
+			dp[i]++;
+			if (i % 2 == 0) {
+				cnt++;
+			}
+		}
+		if (cnt == 0) {
+			return new int[]{};
+		}
+		var set = new HashSet<Integer>();
+		for (int i = 1; i < 10; i++) {
+			if (dp[i] == 0) continue;
+			dp[i]--;
+			for (int j = 0; j < 10; j++) {
+				if (dp[j]==0)continue;
+				dp[j]--;
+				for (int k = 0; k < 10; k++) {
+					if (dp[k]==0 || dp[k] %2==1)continue;
+					set.add(i*100+j*10 + k);
+				}
+				dp[j]++;
+			}
+			dp[i]++;
+		}
+
+		int[] array = new int[set.size()];
+		int index = 0;
+		for (Integer num : set) {
+			array[index++] = num;
+		}
+		Arrays.sort(array);
+		return array;
+	}
 }