diff --git a/src/main/java/com/cool/hot100/greedy/Num55.java b/src/main/java/com/cool/hot100/greedy/Num55.java
new file mode 100644
index 0000000..d5dc8f7
--- /dev/null
+++ b/src/main/java/com/cool/hot100/greedy/Num55.java
@@ -0,0 +1,42 @@
+package com.cool.hot100.greedy;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date: 2024/09/22/19:47
+ * DayNumber 1
+ * Hard 2
+ * Level 5
+ */
+public class Num55 {
+    public boolean canJump(int[] nums) {
+        int len=nums.length;
+        int maxDistance=0;
+        for(int i=0;i<len;i++){
+            if(i<=maxDistance){
+                maxDistance=Math.max(maxDistance,nums[i]+i);
+                if(maxDistance>=len-1){
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @Author Cool
+     * @Date 20:01 2024/9/22
+     * 倒序遍历版
+     **/
+    public boolean canJump1(int[] nums) {
+        int step = 1;
+        for (int i = nums.length - 2; i > -1; i--) {
+            if (nums[i] >= step) {
+                step = 0;
+            }
+            step++;
+        }
+        return step == 1;
+    }
+}