diff --git a/src/main/java/com/cool/ling_cha_mount/dp/Num740.java b/src/main/java/com/cool/ling_cha_mount/dp/Num740.java
new file mode 100644
index 0000000..0b86f51
--- /dev/null
+++ b/src/main/java/com/cool/ling_cha_mount/dp/Num740.java
@@ -0,0 +1,21 @@
+package com.cool.ling_cha_mount.dp;
+
+public class Num740 {
+    public int deleteAndEarn(int[] nums) {
+        int max = Integer.MIN_VALUE;
+        for (int num : nums) {
+            max = Math.max(max, num);
+        }
+        int[] dp = new int[max + 1];
+        for (int num : nums) {
+            dp[num] += num;
+        }
+        int prevMax = 0, currMax = dp[0];
+        for (int i = 1; i < dp.length; i++) {
+            int temp = currMax;
+            currMax = Math.max(currMax, prevMax + dp[i]);
+            prevMax = temp;
+        }
+        return currMax;
+    }
+}