Circular array

CircularArrayRotation.java

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+import java.io.*;
+import java.math.*;
+import java.security.*;
+import java.text.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.regex.*;
+
+public class Solution {
+
+    // This function rotates the array by k steps and then print the values 
+    // of indexes stores in queries array.
+    static int[] circularArrayRotation(int[] a, int k, int[] queries) {
+        int res[]=new int[queries.length];
+        k=k%a.length;
+        for(int i=0; i<queries.length; i++)
+        {
+            if(queries[i]-k<0)
+            res[i]=a[a.length-(k-queries[i])];
+            else
+            res[i]=a[queries[i]-k];
+        }
+    return res;
+    }
+
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) throws IOException {
+        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
+
+        String[] nkq = scanner.nextLine().split(" ");
+
+        int n = Integer.parseInt(nkq[0]);
+
+        int k = Integer.parseInt(nkq[1]);
+
+        int q = Integer.parseInt(nkq[2]);
+
+        int[] a = new int[n];
+
+        String[] aItems = scanner.nextLine().split(" ");
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
+
+        for (int i = 0; i < n; i++) {
+            int aItem = Integer.parseInt(aItems[i]);
+            a[i] = aItem;
+        }
+
+        int[] queries = new int[q];
+
+        for (int i = 0; i < q; i++) {
+            int queriesItem = scanner.nextInt();
+            scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
+            queries[i] = queriesItem;
+        }
+
+        int[] result = circularArrayRotation(a, k, queries);
+
+        for (int i = 0; i < result.length; i++) {
+            bufferedWriter.write(String.valueOf(result[i]));
+
+            if (i != result.length - 1) {
+                bufferedWriter.write("\n");
+            }
+        }
+
+        bufferedWriter.newLine();
+
+        bufferedWriter.close();
+
+        scanner.close();
+    }
+}

Convert12HourClockTo24Hour.java

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+import java.io.*;
+import java.math.*;
+import java.text.*;
+import java.util.*;
+import java.util.regex.*;
+
+public class TimeConversion {
+    //This function will convert AM or PM based time to a 24 hour based time
+    //Sample input 06:09:34PM --> Sample output 18:09:34
+    static String timeConversion(String s) {
+        String unit = Character.toString(s.charAt(s.length()-2))+
+        Character.toString(s.charAt(s.length()-1));
+        int len = s.length();
+        s = s.replace("AM", "");
+        s = s.replace("PM", "");
+        int hour = Integer.parseInt(Character.toString(s.charAt(0))+
+        Character.toString(s.charAt(1)));
+
+        if(unit.equals("AM") && hour==12)
+        {
+            hour = hour-12;
+        }
+        else if(unit.equals("PM") && hour != 12)
+            hour = hour+12;
+
+
+        StringBuilder result = new StringBuilder(s);
+        result.setCharAt(0, (char)((hour/10)+'0'));
+        result.setCharAt(1, (char)((hour%10)+'0'));
+
+          //System.out.print("Unit "+unit+" Hour "+hour+ " Result "+(char)(hour%10));
+        return result.toString();
+    }
+
+    private static final Scanner scan = new Scanner(System.in);
+
+    public static void main(String[] args) throws IOException {
+        Scanner scan = new Scanner(System.in);
+        String s = scan.nextLine();
+
+        String result = timeConversion(s);
+
+        System.out.println(result);
+    }
+}