Q5.java

package QDSA;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Q5 {
    public static void main(String[] args)  throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        int arr[] = new int[n];
        StringTokenizer st = new StringTokenizer(br.readLine());
        for (int i = 0; i < n; i++) {
            arr[i] = Integer.parseInt(st.nextToken());
        }
//        USING QUICKSORT LOGIC FOR PARTITION WHERE PIVOT IS 0
        int pivot =0;
        int i = -1, j = 0;
        while(j<n) {
            if (arr[j] < pivot) {
                i++;
                int temp = arr[i];
                arr[i] = arr[j];
                arr[j] = temp;
            }
            j++;
        }
        for (int k = 0; k < n; k++) {
            System.out.print(arr[k] + " ");
        }
    }
}