fix build

fishercoder1534 · fishercoder1534 · commit 69658eb23a47 · 2021-03-13T16:35:21.000-08:00
diff --git a/src/main/java/com/fishercoder/solutions/_823.java b/src/main/java/com/fishercoder/solutions/_823.java
@@ -9,7 +9,7 @@ public static class Solution1 {
         /**
          * credit: https://leetcode.com/problems/binary-trees-with-factors/discuss/126277/Concise-Java-solution-using-HashMap-with-detailed-explanation.-Easily-understand!!!
          */
-        long MOD = 1000000007l;
+        private static final long MOD = 1000000007L;
 
         public int numFactoredBinaryTrees(int[] arr) {
             Arrays.sort(arr);
