public class Main{
    public static void main (String[] args){
        int[] x = {6, 3, 1, 7, 0, 4, 8, 5, 2, 9};
        quickSort(x, 0, 9);
        for (int i = 0; i < x.length; i++){
            System.out.print(x[i]);
        }
    }
    //基本挿入法（クイックソート）
    public static void quickSort(int[] arr, int left, int right){
        if (left <= right) {
            int p = arr[(left+right) / 2];
            int l = left;
            int r = right;
 
            while(l <= r) {
                while(arr[l] < p){ l++; }
                while(arr[r] > p){ r--; }
 
                if (l <= r) {
                    int tmp = arr[l];
                    arr[l] = arr[r];
                    arr[r] = tmp;
                    l++; 
                    r--;
                }
            }
 
            quickSort(arr, left, r);
            quickSort(arr, l, right);
        }
    }
}

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