Day 29: Bitwise AND

Author: xChivalrouSx

thirty-days-of-code/Solution000030.java

@@ -0,0 +1,57 @@
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.stream.IntStream;
+
+public class Solution000030 {
+
+    // Day 29: Bitwise AND
+    // https://www.hackerrank.com/challenges/30-bitwise-and/problem?isFullScreen=true
+
+    static class Result {
+
+        public static int bitwiseAnd(int n, int k) {
+            int max = 0;
+            for (int i = 1; i <= n; i++) {
+                for (int j = i + 1; j <= n; j++) {
+                    int andResult = i & j;
+                    if (andResult < k && andResult > max) {
+                        max = andResult;
+                    }
+                }
+            }
+            return max;
+        }
+
+    }
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
+
+        int t = Integer.parseInt(bufferedReader.readLine().trim());
+
+        IntStream.range(0, t).forEach(tItr -> {
+            try {
+                String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");
+
+                int count = Integer.parseInt(firstMultipleInput[0]);
+
+                int lim = Integer.parseInt(firstMultipleInput[1]);
+
+                int res = Result.bitwiseAnd(count, lim);
+
+                bufferedWriter.write(String.valueOf(res));
+                bufferedWriter.newLine();
+            } catch (IOException ex) {
+                throw new RuntimeException(ex);
+            }
+        });
+
+        bufferedReader.close();
+        bufferedWriter.close();
+    }
+
+}