diff --git a/src/main/java/contest/y2023/BW99.java b/src/main/java/contest/y2023/BW99.java
new file mode 100644
index 0000000..b85a411
--- /dev/null
+++ b/src/main/java/contest/y2023/BW99.java
@@ -0,0 +1,57 @@
+package contest.y2023;
+
+import com.code.leet.entiy.TwoArray;
+
+import java.util.*;
+
+public class BW99 {
+    public static void main(String[] args) {
+        BW99 solution = new BW99();
+    }
+
+    public int countWays(int[][] ranges) {
+        Arrays.sort(ranges, (o1, o2) -> {
+            if (o1[0] == o2[0]) {
+                return o1[1] - o2[1];
+            }
+            return o1[0] - o2[0];
+        });
+        int sum = 2;
+        int max = ranges[0][1];
+        for (int i = 1; i < ranges.length; i++) {
+            if (ranges[i][0] > max) {
+                sum *= 2;
+                sum %= 1000000007;
+                max = ranges[i][1];
+            } else {
+                max = Math.max(max, ranges[i][1]);
+            }
+        }
+        return sum;
+    }
+
+    public long coloredCells(int n) {
+        return ((long) n - 1) * (n - 1) + (long) n * n;
+    }
+
+    public int splitNum(int num) {
+        String str = "" + num;
+        char[] strs = str.toCharArray();
+        Arrays.sort(strs);
+        int num1 = 0;
+        int num2 = 0;
+        int index = 0;
+        while (strs[index] - '0' == 0) {
+            index++;
+        }
+        for (int i = index; i < strs.length; i++) {
+            if (i % 2 == index % 2) {
+                num1 = num1 * 10 + (strs[i] - '0');
+            } else {
+                num2 = num2 * 10 + (strs[i] - '0');
+            }
+        }
+        return num1 + num2;
+    }
+
+}