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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Revenue:        
Total revenue $ 988,141 $ 976,712 $ 2,579,198 $ 2,703,677
Cost of goods sold:        
Total cost of goods sold 513,591 512,031 1,334,338 1,455,135
Gross profit 474,550 464,681 1,244,860 1,248,542
Operating expenses:        
Research and development 146,225 130,221 389,212 392,651
Selling and marketing 114,924 94,763 322,589 303,043
General and administrative 48,863 41,635 132,491 126,133
Significant asset impairments and restructuring costs 9,789 6,515 23,865 14,798
Amortization of intangible assets 5,967 5,840 17,896 17,532
Acquisition and integration costs (recoveries) 259 (2,329) 860 904
Total operating expenses 326,027 276,645 886,913 855,061
Income from operations 148,523 188,036 357,947 393,481
Interest and other income (loss), net 795 232 (1,600) 1,213
Interest expense (7,776) (7,251) (22,921) (23,926)
Loss on extinguishment and modification of debt 0 0 0 (646)
Income before income taxes 141,542 181,017 333,426 370,122
Provision (benefit) for income taxes (96,690) 38,750 (63,271) 73,872
Net income $ 238,232 $ 142,267 $ 396,697 $ 296,250
Basic net income per common share (in dollars per share) $ 1.53 $ 0.92 $ 2.55 $ 1.92
Diluted net income per potential common share (in dollars per share) $ 1.52 $ 0.91 $ 2.53 $ 1.90
Weighted average basic common shares outstanding (in shares) 155,271 154,184 155,277 154,136
Weighted average dilutive potential common shares outstanding (in shares) 156,744 156,318 156,742 155,741
Products        
Revenue:        
Total revenue $ 804,414 $ 819,022 $ 2,071,677 $ 2,246,129
Cost of goods sold:        
Total cost of goods sold 420,236 436,227 1,074,935 1,230,378
Services        
Revenue:        
Total revenue 183,727 157,690 507,521 457,548
Cost of goods sold:        
Total cost of goods sold $ 93,355 $ 75,804 $ 259,403 $ 224,757