Implementation

ID find(Object x) {

assert(hTable.contains(x));

ID xID = hTable[x];

while(up[xID] != -1) {

xID = up[xID];

}

return xID;

}

ID union(ID x, ID y) {

assert(up[x] == -1);

assert(up[y] == -1);

up[y] = x;

}

typedef ID int;

runtime: O(depth) or …

runtime: O(1)

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