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Java basics

typedef


Used in creating a union which provide means to group different types of variable under one name for easier handling.

Syntax:
union union_name {
data_type1 variable1; 
data_type2 variable2;
data_type3 variable3;
}


Example:

public static void main(String[] args) {
        int N = StdIn.readInt();
        WeightedQuickUnionUF uf = new WeightedQuickUnionUF(N);
        while (!StdIn.isEmpty()) {
            int p = StdIn.readInt();
            int q = StdIn.readInt();
            if (uf.connected(p, q)) continue;
            uf.union(p, q);
            StdOut.println(p + " " + q);
        }
        StdOut.println(uf.count() + " components");
    }

}


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