diff --git a/SourceCollector.py b/SourceCollector.py
index 7dc58e3..d795172 100644
--- a/SourceCollector.py
+++ b/SourceCollector.py
@@ -88,10 +88,8 @@ class SourceCollector:
                     parent.children.append(new_node)
                     queue.append((nx, ny, new_node))
         return root
-        
 
-        
-    
+
     def outofmap(self,x,y):
         return x < 0 or y < 0 or x > self.rowNums or y > self.colNums
     def getlca(self,u, v):
@@ -136,20 +134,31 @@ class SourceCollector:
         
         full_path = u_to_lca + lca_to_v[:-1]
         return full_path
-    def dfs(self,sn):
-        
+    def dfs(self, sn):
         sn.dp = sn.val
         sn.final_pos = sn.pos
-        sn.path= [sn]
+        sn.path = [sn]
+        # 对子节点按收益/距离优先遍历
+        children = sn.children[:]
+        # 计算每个child的“贪心优先级”：金币优先，距离近优先
+        def child_priority(child):
+            # 距离=曼哈顿距离
+            dist = abs(child.pos[0] - sn.pos[0]) + abs(child.pos[1] - sn.pos[1])
+            # 金币优先，陷阱次之
+            if self.maze[child.pos[0]][child.pos[1]].startswith('g'):
+                return (0, dist)  # 金币优先，距离近优先
+            elif self.maze[child.pos[0]][child.pos[1]].startswith('t'):
+                return (2, dist)  # 陷阱最后
+            else:
+                return (1, dist)  # 普通通路
+        children.sort(key=child_priority)
         cur = None
-        for idx,child in enumerate(sn.children):
+        for idx, child in enumerate(children):
             self.dfs(child)
-            if child.dp > 0:       
-                sn.dp += child.dp 
-                
-                if cur != None:
-                    sn.path.extend(self.getlca(sn.path[-1],child))
-                    
+            if child.dp > 0:
+                sn.dp += child.dp
+                if cur is not None:
+                    sn.path.extend(self.getlca(sn.path[-1], child))
                 sn.path.extend(child.path)
                 cur = child
                 sn.final_pos = cur.final_pos
@@ -199,7 +208,11 @@ class SourceCollector:
         
 
         self.path =[_.pos for _ in sn.path]
-        # 如果终点不是e，则bfs补全
+        for idx,item in enumerate(self.path):
+            if idx > 0:
+                if item == self.path[idx-1]:
+                    del self.path[idx]
+                    
         if self.path and self.end_pos and self.path[-1] != self.end_pos:
             bfs_tail = self.bfs_path(self.path[-1], self.end_pos)
             if bfs_tail:
diff --git a/maze.csv b/maze.csv
deleted file mode 100644
index 81cd7cc..0000000
--- a/maze.csv
+++ /dev/null
@@ -1,16 +0,0 @@
-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
-1,t15,1,0,1,0,1,l16,0,0,0,t8,0,0,0,1
-1,0,1,0,1,0,1,1,1,0,1,1,1,1,0,1
-1,0,1,0,1,0,1,0,0,0,1,0,l15,0,0,1
-1,0,1,0,1,t18,1,0,1,0,1,1,1,0,1,1
-1,0,1,0,1,t15,0,0,1,0,1,0,l26,0,1,1
-1,g11,1,0,1,0,1,t19,1,0,1,0,1,0,1,1
-1,0,1,0,1,0,1,0,1,0,1,0,1,l11,0,1
-1,0,1,0,1,0,1,1,1,0,1,1,1,1,1,1
-1,0,g30,0,1,0,1,0,l19,0,0,0,0,0,0,1
-1,1,0,1,1,1,1,1,0,1,1,1,1,1,1,1
-1,0,0,0,1,s,0,0,0,0,0,0,0,0,b70,1
-1,0,1,0,0,0,1,1,1,1,1,1,1,1,1,1
-1,0,1,0,1,0,0,0,0,e,0,t8,g13,t5,1,1
-1,0,1,0,1,1,1,1,1,1,1,0,1,0,0,1
-1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1