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註釋Abstract: "A salvage-embedding (S-embedding) maps an M-leaf complete binary tree G into an (N> M)-leaf complete binary tree H, the fraction G of whose leaves have been labeled Good. The S-embedding maps leaves of G one-to-one to Good leaves of H; it may be many-to-one on internal nodes. The quality of an S-embedding depends on its harvest, the ratio H = [subscript def] M/GN, and its congestion, the largest number of edges of G that get 'routed' across the same edge of H. We study three scenarios. In the worst-case scenario: given any target harvest H [