feat(segment tree): Add method of getting the size of the tree

agribeau · agribeau · commit 10c7a44b7e0c · 2018-10-16T12:46:26.000+08:00
diff --git a/src/data_structure/tree/segment_tree/SegmentTree.java b/src/data_structure/tree/segment_tree/SegmentTree.java
@@ -14,4 +14,11 @@ public SegmentTree(E[] arr) {
         tree = (E[]) new Object[4 * arr.length];
     }
 
+    /**
+     * 获取线段树的大小
+     */
+    public int size() {
+        return data.length;
+    }
+
 }
