add 1432

fishercoder1534 · fishercoder1534 · commit 0d542d30882b · 2020-05-02T09:41:48.000-07:00
diff --git a/README.md b/README.md
@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ &#9733;
 
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
+|1432|[Max Difference You Can Get From Changing an Integer](https://leetcode.com/problems/max-difference-you-can-get-from-changing-an-integer/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1432.java) | |Medium|String|
 |1431|[Kids With the Greatest Number of Candies](https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1431.java) | |Easy|Array|
 |1423|[Maximum Points You Can Obtain from Cards](https://leetcode.com/problems/maximum-points-you-can-obtain-from-cards/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1423.java) | |Medium|Array, DP, Sliding Window|
 |1422|[Maximum Score After Splitting a String](https://leetcode.com/problems/maximum-score-after-splitting-a-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1422.java) | |Easy|String|
diff --git a/src/main/java/com/fishercoder/solutions/_1432.java b/src/main/java/com/fishercoder/solutions/_1432.java
@@ -0,0 +1,85 @@
+package com.fishercoder.solutions;
+
+public class _1432 {
+    public static class Solution1 {
+        public int maxDiff(int num) {
+            int smallest = getSmallest(num);
+            int biggest = getBiggest(num);
+            return biggest - smallest;
+        }
+
+        private int getBiggest(int num) {
+            int firstDigit = Integer.parseInt(Integer.toString(num).substring(0, 1));
+            if (firstDigit == 9) {
+                String remainder = Integer.toString(num).substring(1);
+                int numberToChangeToNine = 0;
+                for (char c : remainder.toCharArray()) {
+                    if (c == '9') {
+                        continue;
+                    } else {
+                        numberToChangeToNine = Integer.parseInt("" + c);
+                        break;
+                    }
+                }
+                StringBuilder sb = new StringBuilder();
+                sb.append('9');
+                for (char c : remainder.toCharArray()) {
+                    if (Integer.parseInt(c + "") == numberToChangeToNine) {
+                        sb.append("9");
+                    } else {
+                        sb.append(c);
+                    }
+                }
+                return Integer.parseInt(sb.toString());
+            } else {
+                int numberToChangeToNine = firstDigit;
+                StringBuilder sb = new StringBuilder();
+                for (char c : Integer.toString(num).toCharArray()) {
+                    if (Integer.parseInt("" + c) == numberToChangeToNine) {
+                        sb.append("9");
+                    } else {
+                        sb.append(c);
+                    }
+                }
+                return Integer.parseInt(sb.toString());
+            }
+        }
+
+        private int getSmallest(int num) {
+            int firstDigit = Integer.parseInt(Integer.toString(num).substring(0, 1));
+            if (firstDigit == 1) {
+                String remainder = Integer.toString(num).substring(1);
+                int numberToChangeToZero = 0;
+                for (char c : remainder.toCharArray()) {
+                    if (c == '0' || c == '1') {
+                        continue;
+                    } else {
+                        numberToChangeToZero = Integer.parseInt("" + c);
+                        break;
+                    }
+                }
+                StringBuilder sb = new StringBuilder();
+                sb.append('1');
+                for (char c : remainder.toCharArray()) {
+                    if (Integer.parseInt(c + "") == numberToChangeToZero) {
+                        sb.append("0");
+                    } else {
+                        sb.append(c);
+                    }
+                }
+                return Integer.parseInt(sb.toString());
+            } else {
+                int numberToChangeToOne = firstDigit;
+                StringBuilder sb = new StringBuilder();
+                for (char c : Integer.toString(num).toCharArray()) {
+                    if (Integer.parseInt("" + c) == numberToChangeToOne) {
+                        sb.append("1");
+                    } else {
+                        sb.append(c);
+                    }
+                }
+                return Integer.parseInt(sb.toString());
+            }
+        }
+    }
+}
diff --git a/src/test/java/com/fishercoder/_1432Test.java b/src/test/java/com/fishercoder/_1432Test.java
@@ -0,0 +1,22 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1432;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _1432Test {
+    private static _1432.Solution1 solution1;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _1432.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(888, solution1.maxDiff(555));
+    }
+
+}
