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@karmiclychee
Created June 26, 2014 23:02
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public int find(int p) {
if (p < 0 || p >= id.length) throw new IndexOutOfBoundsException();
while (p != id[p]) {
id[p] = id[id[p]]; // path compression by halving
p = id[p];
}
return p;
}
@karmiclychee
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  public int find(int component) {
        // finds the root of the component group
        if (component < 0 || component >= components.length) throw new IndexOutOfBoundsException();
        if (components[component] != component) {
            return find(components[component]);
        } else {
            return component;
        }
    }

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