content: public class RadixSort {
      public static void radixSort(int[] arr) {
          int max = Arrays.stream(arr).max().getAsInt();
          for (int exp = 1; max / exp > 0; exp *= 10) {
              countingSortByDigit(arr, exp);
          }
      }
  
      public static void countingSortByDigit(int[] arr, int exp) {
          int n = arr.length;
          int[] output = new int[n];
          int[] count = new int[10];
  
          Arrays.fill(count, 0);
  
          for (int i = 0; i < n; i++) {
              count[(arr[i] / exp) % 10]++;
          }
  
          for (int i = 1; i < 10; i++) {
              count[i] += count[i - 1];
          }
  
          for (int i = n - 1; i >= 0; i--) {
              output[count[(arr[i] / exp) % 10] - 1] = arr[i];
              count[(arr[i] / exp) % 10]--;
          }
  
          for (int i = 0; i < n; i++) {
              arr[i] = output[i];
          }
      }
  
      public static void main(String[] args) {
          int[] arr = {170, 45, 75, 90, 802, 24, 2, 66};
          radixSort(arr);
          System.out.println("Sorted array: " + Arrays.toString(arr));
      }
  }
  