The famous algorithm to avoid deadlock is the banker's algorithm.
Four conditions:
1. When applying for bank loans in batches, the total amount applied for cannot exceed the amount initially applied for;
2. When applying for a loan It cannot exceed the bank's existing funds;
3. When the bank's funds cannot meet the customer's loan needs, payment can be postponed, but the customer will definitely be able to get the loan within the time required;
4. After receiving the loan, the customer must repay it within the specified time.
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