Java Simple Code /* Saving page no as key in hashMap, value as pages turns(steps) pageNo steps 0 0 1 0

                2         1
                3         1

                4         2
                5             2
so on....*/

Java Simple Code import java.util.*;

public class DrawingBookPages { public static void main(String[] args){ Scanner sc = new Scanner(System.in); int n = sc.nextInt(); //no of pages in book int p = sc.nextInt(); // page to turn to

    int steps = 0;
    Map<Integer, Integer> hmap = new HashMap<>();
    for(int i=0; i<=n; i++){
        hmap.put(i, steps);
        i++;
        if(i<=n) hmap.put(i, steps);
        steps++;
    }
    System.out.println(Math.min(hmap.get(p), hmap.get(n)-hmap.get(p)));
}

}