The answer
They dictate the required time complexity. A large constraint (N=10^6) means you must write an efficient O(N) or O(log N) algorithm, ruling out brute force O(N^2).
Understanding Problem Constraints and Inputs
How do constraints hint at the solution?
More FAQs in Understanding Problem Constraints and Inputs
Constraints are the boundaries of the input values (e.g., the size of the array, the maximum value of a number) that your code will be tested against.
An edge case is a rare or extreme situation, such as receiving an empty array, a null value, or extremely large numbers, which often breaks poorly planned code.
Yes, it is a good practice to handle edge cases at the very beginning of your function with simple 'if' statements to prevent runtime errors.
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