Create 2843_Count_Symmetric_Integers.java

Author: vishwajeetmishra4

JAVA/2843_Count_Symmetric_Integers.java

@@ -0,0 +1,26 @@
+// Problem Number: 2843.
+
+// Count Symmetric Integers.
+
+class Solution {
+  public int countSymmetricIntegers(int low, int high) {
+    int ans = 0;
+
+    for (int num = low; num <= high; ++num)
+      if (isSymmetricInteger(num))
+        ++ans;
+
+    return ans;
+  }
+
+  private boolean isSymmetricInteger(int num) {
+    if (num >= 10 && num <= 99)
+      return num / 10 == num % 10;
+    if (num >= 1000 && num <= 9999) {
+      final int left = num / 100;
+      final int right = num % 100;
+      return left / 10 + left % 10 == right / 10 + right % 10;
+    }
+    return false;
+  }
+}