modify code

Author: algorithmzuo

src/class165/Code02_UndoUnionFind1.java

@@ -55,12 +55,12 @@ public static void merge(int h1, int h2) {
 			big = h2;
 			small = h1;
 		}
-		stacksiz++;
-		opstack[stacksiz][0] = big;
-		opstack[stacksiz][1] = small;
 		father[small] = big;
 		ncnt[big] += ncnt[small];
 		ecnt[big] += ecnt[small] + 1;
+		stacksiz++;
+		opstack[stacksiz][0] = big;
+		opstack[stacksiz][1] = small;
 	}
 
 	public static void undo() {

src/class165/Code02_UndoUnionFind2.java

@@ -51,12 +51,12 @@
 //        big = h2;
 //        small = h1;
 //    }
-//    stacksiz++;
-//    opstack[stacksiz][0] = big;
-//    opstack[stacksiz][1] = small;
 //    father[small] = big;
 //    ncnt[big] += ncnt[small];
 //    ecnt[big] += ecnt[small] + 1;
+//    stacksiz++;
+//    opstack[stacksiz][0] = big;
+//    opstack[stacksiz][1] = small;
 //}
 //
 //void undo() {