01204212/like
- This is part of 01204212
You want to keep track of the number of "likes" each status has. In the beginning, every status has 0 likes. You are given a sequence of like clicks (as a sequence of status IDs).
Input
- First line: an integer N (1<=N<=100,000)
- The next N lines: each line contains an integer x, the ID of the post clicked.
Output
There are N lines of output, each contains the current number of likes the post ID x has so far (including this one).
เนื้อหา
Example
Input
10 4 2 4 10 100 30 10 35 4 200
Output
1 1 2 1 1 1 2 1 3 1
Test data
Use the test data for ID requests
Download at: here
Solution to n10.in
1 1 1 1 1 1 1 2 1 2
Solution to n1000.in (first 20 lines)
1 1 1 1 1 2 1 1 1 1 1 2 3 1 2 1 4 2 1 1
Code
Collections: you will have to use the Map interface. These are implementations:
You can use the same Main class from task ID request
Code for your own implementation of binary search trees
TreeNode
public class TreeNode {
public int val;
public TreeNode leftChild;
public TreeNode rightChild;
public TreeNode(int v) {
val = v;
leftChild = rightChild = null;
}
}
An example of find
private TreeNode find(TreeNode node, int val) {
if(node == null) {
return null;
}
if(node.val == val) {
return node;
} else if(node.val < val) {
return find(node.rightChild, val);
} else {
return find(node.leftChild, val);
}
}