refactor 399

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_399.java

@@ -12,62 +12,62 @@ public static class Solution1 {
         /**
          * Credit: https://medium.com/@null00/leetcode-evaluate-division-52a0158488c1
          */
-      private Map<String, String> root;
-      private Map<String, Double> rate;
+        private Map<String, String> root;
+        private Map<String, Double> rate;
 
-      public double[] calcEquation(List<List<String>> equations, double[] values, List<List<String>> queries) {
-        root = new HashMap<String, String>();
-        rate = new HashMap<String, Double>();
-        int n = equations.size();
-        for (int i = 0; i < n; ++i) {
-            String X = equations.get(i).get(0);
-            String Y = equations.get(i).get(1);
-            root.put(X, X);
-            root.put(Y, Y);
-            rate.put(X, 1.0);
-            rate.put(Y, 1.0);
-        }
+        public double[] calcEquation(List<List<String>> equations, double[] values, List<List<String>> queries) {
+            root = new HashMap<>();
+            rate = new HashMap<>();
+            int n = equations.size();
+            for (int i = 0; i < n; ++i) {
+                String X = equations.get(i).get(0);
+                String Y = equations.get(i).get(1);
+                root.put(X, X);
+                root.put(Y, Y);
+                rate.put(X, 1.0);
+                rate.put(Y, 1.0);
+            }
 
-        for (int i = 0; i < n; ++i) {
-            String X = equations.get(i).get(0);
-            String Y = equations.get(i).get(1);
-            union(X, Y, values[i]);
-        }
+            for (int i = 0; i < n; ++i) {
+                String X = equations.get(i).get(0);
+                String Y = equations.get(i).get(1);
+                union(X, Y, values[i]);
+            }
+
+            double[] result = new double[queries.size()];
+            for (int i = 0; i < queries.size(); ++i) {
+                String X = queries.get(i).get(0);
+                String Y = queries.get(i).get(1);
+                if (!root.containsKey(X) || !root.containsKey(Y)) {
+                    result[i] = -1;
+                    continue;
+                }
 
-        double[] result = new double[queries.size()];
-        for (int i = 0; i < queries.size(); ++i) {
-            String X = queries.get(i).get(0);
-            String Y = queries.get(i).get(1);
-            if (!root.containsKey(X) || !root.containsKey(Y)) {
-                result[i] = -1;
-                continue;
+                String rootx = findRoot(X, X, 1.0);
+                String rooty = findRoot(Y, Y, 1.0);
+                result[i] = rootx.equals(rooty) ? rate.get(X) / rate.get(Y) : -1.0;
             }
 
+            return result;
+        }
+
+        private void union(String X, String Y, double v) {
             String rootx = findRoot(X, X, 1.0);
             String rooty = findRoot(Y, Y, 1.0);
-            result[i] = rootx.equals(rooty) ? rate.get(X) / rate.get(Y) : -1.0;
+            root.put(rootx, rooty);
+            double r1 = rate.get(X);
+            double r2 = rate.get(Y);
+            rate.put(rootx, v * r2 / r1);
         }
-        
-        return result;
-      }
 
-      private void union(String X, String Y, double v) {
-        String rootx = findRoot(X, X, 1.0);
-        String rooty = findRoot(Y, Y, 1.0);
-        root.put(rootx, rooty);
-        double r1 = rate.get(X);
-        double r2 = rate.get(Y);
-        rate.put(rootx, v * r2 / r1);
-      }
+        private String findRoot(String originalX, String X, double r) {
+            if (root.get(X).equals(X)) {
+                root.put(originalX, X);
+                rate.put(originalX, r * rate.get(X));
+                return X;
+            }
 
-      private String findRoot(String originalX, String X, double r) {
-        if (root.get(X).equals(X)) {
-            root.put(originalX, X);
-            rate.put(originalX, r * rate.get(X));
-            return X;
+            return findRoot(originalX, root.get(X), r * rate.get(X));
         }
-
-        return findRoot(originalX, root.get(X), r * rate.get(X));
-      }    
     }
 }