refactor 41

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_41.java

@@ -1,49 +1,36 @@
 package com.fishercoder.solutions;
 
-/**
- *41. First Missing Positive
- *
- *Given an unsorted integer array, find the first missing positive integer.
-
- For example,
- Given [1,2,0] return 3,
- and [3,4,-1,1] return 2.
-
- Your algorithm should run in O(n) time and uses constant space.
- */
-
 public class _41 {
 
-  public static class Solution1 {
-    /**
-     * Time: O(n) Space: O(1)
-     *
-     * Idea: put every number in its right position, e.g. put 5 in nums[4].
-     */
-    public int firstMissingPositive(int[] nums) {
-      int i = 0;
-      while (i < nums.length) {
-        if (nums[i] > 0 && nums[i] != i + 1 && nums[i] - 1 < nums.length && nums[i] != nums[nums[i]
-            - 1]) {
-          swap(nums, i, nums[i] - 1);
-        } else {
-          i++;
+    public static class Solution1 {
+        /**
+         * Time: O(n) Space: O(1)
+         * Idea: put every number in its right position, e.g. put 5 in nums[4].
+         */
+        public int firstMissingPositive(int[] nums) {
+            int i = 0;
+            while (i < nums.length) {
+                if (nums[i] > 0 && nums[i] != i + 1 && nums[i] - 1 < nums.length && nums[i] != nums[nums[i]
+                        - 1]) {
+                    swap(nums, i, nums[i] - 1);
+                } else {
+                    i++;
+                }
+            }
+
+            for (int j = 0; j < nums.length; j++) {
+                if (nums[j] != j + 1) {
+                    return j + 1;
+                }
+            }
+
+            return nums.length + 1;
         }
-      }
 
-      for (int j = 0; j < nums.length; j++) {
-        if (nums[j] != j + 1) {
-          return j + 1;
+        void swap(int[] nums, int i, int j) {
+            int temp = nums[i];
+            nums[i] = nums[j];
+            nums[j] = temp;
         }
-      }
-
-      return nums.length + 1;
-    }
-
-    void swap(int[] nums, int i, int j) {
-      int temp = nums[i];
-      nums[i] = nums[j];
-      nums[j] = temp;
     }
-  }
 }