CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Cash flows from operating activities:
Net income	$ 113,658	$ 227,531
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	209,363	98,969
Amortization of deferred contract acquisition costs	56,780	37,766
Losses on strategic investments, net	36,404	0
Depreciation and amortization	15,280	10,663
Provision for accounts receivable allowances	13,097	4,055
Non-cash operating lease cost	5,451	4,274
Amortization on marketable securities	3,604	5,596
Other	12,730	270
Changes in operating assets and liabilities:
Accounts receivable	(83,605)	(75,665)
Prepaid expenses and other assets	(27,235)	(29,975)
Deferred contract acquisition costs	(65,690)	(47,813)
Accounts payable	11,153	1,592
Accrued expenses and other liabilities	78,236	88,656
Deferred revenue	152,974	210,896
Operating lease liabilities, net	(6,049)	(3,513)
Net cash provided by operating activities	526,151	533,302
Cash flows from investing activities:
Purchases of marketable securities	(611,662)	(1,425,451)
Maturities of marketable securities	609,327	291,047
Purchases of property and equipment	(25,038)	(79,074)
Purchases of strategic investments	(11,750)	(6,500)
Purchases of intangible assets	(3,211)	0
Net cash used in investing activities	(42,334)	(1,219,978)
Cash flows from financing activities:
Cash paid for repurchases of common stock	(132,412)	0
Proceeds from employee equity transactions remitted to employees and tax authorities, net	(4,086)	(9,984)
Proceeds from exercise of stock options	3,255	3,368
Other	0	337
Net cash used in financing activities	(133,243)	(6,279)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(9,425)	0
Net increase (decrease) in cash, cash equivalents, and restricted cash	341,149	(692,955)
Cash, cash equivalents, and restricted cash – beginning of period	1,073,353	2,293,116
Cash, cash equivalents, and restricted cash – end of period	1,414,502	1,600,161
Reconciliation of cash, cash equivalents, and restricted cash within the condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows above:
Cash and cash equivalents	1,407,305	1,557,270
Restricted cash, current included in prepaid expenses and other current assets	6,923	40,648
Restricted cash, noncurrent included in other assets, noncurrent	274	2,243
Total cash, cash equivalents, and restricted cash	$ 1,414,502	$ 1,600,161