import java.util.*;
 
public class Main {
    public static boolean containsNearbyDuplicateBruteForce(int[] nums, int k) {
        int n = nums.length;
        for (int i = 0; i < n; ++i) {
            for (int j = i + 1; j < n && j <= i + k; ++j) {
                if (nums[i] == nums[j]) {
                    return true;
                }
            }
        }
        return false;
    }
 
    public static void main(String[] args) {
        int[] nums = {1, 1, 3, 1, 2, 3};
        int k = 2;
        if (containsNearbyDuplicateBruteForce(nums, k)) {
            System.out.println("There are two equal numbers within distance " + k);
        } else {
            System.out.println("No two equal numbers found within distance " + k);
        }
    }
}

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