1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/* The Great Computer Language Shootout
http://shootout.alioth.debian.org/
contributed by Isaac Gouy */
function TreeNode(left,right,item){
this.left = left;
this.right = right;
this.item = item;
}
TreeNode.prototype.itemCheck = function(){
if (this.left==null) return this.item;
else return this.item + this.left.itemCheck() - this.right.itemCheck();
}
function bottomUpTree(item,depth){
if (depth>0){
return new TreeNode(
bottomUpTree(2*item-1, depth-1)
,bottomUpTree(2*item, depth-1)
,item
);
}
else {
return new TreeNode(null,null,item);
}
}
var minDepth = 4;
var n = 0; //arguments[0];
var maxDepth = Math.max(minDepth + 2, n);
var stretchDepth = maxDepth + 1;
var check = bottomUpTree(0,stretchDepth).itemCheck();
//print("stretch tree of depth " + stretchDepth + "\t check: " + check);
var longLivedTree = bottomUpTree(0,maxDepth);
for (var depth=minDepth; depth<=maxDepth; depth+=2){
var iterations = 1 << (maxDepth - depth + minDepth);
check = 0;
for (var i=1; i<=iterations; i++){
check += bottomUpTree(i,depth).itemCheck();
check += bottomUpTree(-i,depth).itemCheck();
}
// print(iterations*2 + "\t trees of depth " + depth + "\t check: " + check);
}
//print("long lived tree of depth " + maxDepth + "\t check: "
// + longLivedTree.itemCheck());
|
