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Consolidated Balance Sheets (Parenthetical) - $ / shares
Oct. 27, 2018
Apr. 28, 2018
Oct. 28, 2017
Common stock, par value $ 0.001 $ 0.001 $ 0.001
Common stock, shares authorized 300,000,000 300,000,000 300,000,000
Common stock, shares issued 112,752,000 112,238,000 112,226,000
Treasury stock, shares 39,732,000 39,585,000 39,580,000