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RadixSort.java
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58 lines (47 loc) · 1.51 KB
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;
class Radix {
static int getMax(int arr[], int n)
{
int mx = arr[0];
for (int i = 1; i < n; i++)
if (arr[i] > mx)
mx = arr[i];
return mx;
}
static void countSort(int arr[], int n, int exp)
{
int output[] = new int[n]; // output array
int i;
int count[] = new int[10];
Arrays.fill(count, 0);
for (i = 0; i < n; i++)
count[(arr[i] / exp) % 10]++;
for (i = 1; i < 10; i++)
count[i] += count[i - 1];
for (i = n - 1; i >= 0; i--) {
output[count[(arr[i] / exp) % 10] - 1] = arr[i];
count[(arr[i] / exp) % 10]--;
}
for (i = 0; i < n; i++)
arr[i] = output[i];
}
static void radixSort(int arr[], int n) {
int m = getMax(arr, n);
for (int exp = 1; m / exp > 0; exp *= 10)
countSort(arr, n, exp);
}
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
int arr[] = new int[n];
String[] integerStrings = br.readLine().split(" ");
for (int i = 0; i < arr.length; i++) {
arr[i] = Integer.parseInt(integerStrings[i]);
}
radixSort(arr, n);
for (int i = 0; i < n; i++)
System.out.print(arr[i] + " ");
}
}