希尔排序

//希尔排序public static void shell(int a[]) {int N = a.length;for (int h = N/2;h>0;h/=2) {for (int i = h;i<N;i++) {for (int j = i ;j >=h&&a[j]<a[j-h];j-=h) {swap(a, j, j-h);}}System.out.println(Arrays.toString(a));}}