refactor 278

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_278.java

@@ -1,37 +1,44 @@
 package com.fishercoder.solutions;
 
-/**You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad version are also bad.
-
- Suppose you have n versions [1, 2, ..., n] and you want to find out the first bad one, which causes all the following ones to be bad.
-
- You are given an API bool isBadVersion(version) which will return whether version is bad. Implement a function to find the first bad version. You should minimize the number of calls to the API.*/
+/**
+ * 278. First Bad Version
+ *
+ * You are a product manager and currently leading a team to develop a new product.
+ * Unfortunately, the latest version of your product fails the quality check.
+ * Since each version is developed based on the previous version, all the versions after a bad version are also bad.
+ * Suppose you have n versions [1, 2, ..., n] and you want to find out the first bad one,
+ * which causes all the following ones to be bad.
+ *
+ * You are given an API bool isBadVersion(version) which will return whether version is bad.
+ * Implement a function to find the first bad version. You should minimize the number of calls to the API.*/
 public class _278 {
 
-	public int firstBadVersion(int n) {
-		int left = 1;
-		int right = n;
-		if (isBadVersion(left)) {
-			return left;
-		}
+	public static class Solution1 {
+		public int firstBadVersion(int n) {
+			int left = 1;
+			int right = n;
+			if (isBadVersion(left)) {
+				return left;
+			}
 
-		while (left + 1 < right) {
-			int mid = left + (right - left) / 2;
-			if (isBadVersion(mid)) {
-				right = mid;
-			} else {
-				left = mid;
+			while (left + 1 < right) {
+				int mid = left + (right - left) / 2;
+				if (isBadVersion(mid)) {
+					right = mid;
+				} else {
+					left = mid;
+				}
 			}
-		}
 
-		if (isBadVersion(left)) {
-			return left;
+			if (isBadVersion(left)) {
+				return left;
+			}
+			return right;
 		}
-		return right;
-	}
 
-	private boolean isBadVersion(int left) {
-		//this is a fake method to make Eclipse happy
-		return false;
+		private boolean isBadVersion(int left) {
+			//this is a fake method to make Eclipse happy
+			return false;
+		}
 	}
-
 }