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40 lines
759 B
Java
40 lines
759 B
Java
public class DoublyLinkedList {
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int[] next;
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int[] prev;
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public DoublyLinkedList(int maxSize) {
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// 0 - dummy element
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next = new int[maxSize + 1];
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prev = new int[maxSize + 1];
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}
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public void insert(int x, int pos) {
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prev[x] = pos;
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next[x] = next[pos];
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prev[next[x]] = x;
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next[prev[x]] = x;
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}
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public void remove(int x) {
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next[prev[x]] = next[x];
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prev[next[x]] = prev[x];
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}
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// Usage example
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public static void main(String[] args) {
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int n = 10;
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DoublyLinkedList list = new DoublyLinkedList(n);
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for (int i = 1; i <= n; i++) {
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list.insert(i, 0);
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}
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list.remove(1);
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list.remove(10);
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list.remove(5);
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for (int i = list.next[0]; i != 0; i = list.next[i]) {
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System.out.print(i + " ");
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}
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System.out.println();
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}
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}
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