ArrayList<Integer> nearlySorted(intarr[],intnum,intk) {//使用一个小顶堆来保持一个k size的window,每次取出最小元素PriorityQueue<Integer> pq =newPriorityQueue<>();intcurr = 0;for(inti = 0; i < arr.length; i++) { pq.offer(arr[i]);//如果so far已经超过k个元素,那么可以开始输出元素if...
这是少于阀值QUICKSORT_THRESHOLD(286)的两种情况,至于大于286的,它会进入归并排序(Merge Sort),但在此之前,它有个小动作: // Check if the array is nearly sorted for (int k = left; k < right; run[count] = k) { if (a[k] < a[k + 1]) { // ascending while (++k <= right && a[...
int count = 0; run[0] = left; // Check if the array is nearly sorted for (int k = left; k < right; run[count] = k) { if (a[k] < a[k + 1]) { // ascending while (++k <= right && a[k - 1] <= a[k]); } else if (a[k] > a[k + 1]) { // descending ...
* (ascending or descending sequence). */int[]run=newint[MAX_RUN_COUNT+1];intcount=0;run[0]=left;// Check if the array is nearly sortedfor(intk=left;k<right;run[count]=k){if(a[k]<a[k+1]){// ascendingwhile(++k<=right&&a[k-1]<=a[k]);}elseif(a[k]>a[k+1]){// d...
// Check if the array is nearly sorted for (int k = left; k < right; run[count] = k) { if (a[k] < a[k + 1]) { // ascending while (++k <= right && a[k - 1] <= a[k]) ; } else if (a[k] > a[k + 1]) { // descending ...
// Check if the array is nearly sorted for (int k = left; k < right; run[count] = k) { if (a[k] < a[k + 1]) { // ascending 升序 while (++k <= right && a[k - 1] <= a[k]); } else if (a[k] > a[k
If the input array is nearly sorted, the implementation requires approximately n comparisons. Temporary storage requirements vary from a small constant for nearly sorted input arrays to n/2 object references for randomly ordered input arrays. The implementation takes equal advantage of ascending and ...
1 // Check if the array is nearly sorted 2 for (int k = left; k < right; run[count] = k) { if (a[k] < a[k + 1]) { // ascending 3 while (++k <= right && a[k - 1] <= a[k]); 4 } else if (a[k] > a[k + 1]) { // descending ...
所以大于或等于47或少于286会进入快排,而在大于或等于286后,会有个小动作:“// Check if the array is nearly sorted”。这里第一个作用是先梳理一下数据方便后续的双枢轴归并排序,第二个作用就是即便大于286,但在降序组太多的时候(被判断为没有结构的数据,The array is not highly structured,use Quicksort ...
// If list is already sorted, just copy from src to dest. This is an// optimization that results in faster sorts for nearly ordered lists.if(((Comparable)src[mid-1]).compareTo(src[mid])<=0){System.arraycopy(src,low,dest,destLow,length);return;}// Merge sorted halves (now in src...