Leetcode Problem 2761. Prime Pairs With Target Sum

2761. Prime Pairs With Target Sum

Leetcode Solutions

Sieve of Eratosthenes and Pair Search

  1. Initialize a boolean array isPrime of size n+1 and set all entries to True except for indices 0 and 1.
  2. Use the Sieve of Eratosthenes algorithm to mark non-prime numbers in isPrime as False.
  3. Iterate through the array isPrime and for each prime number i, check if n-i is also prime.
  4. If both i and n-i are prime, add the pair [i, n-i] to the result list.
  5. Return the result list containing all the prime pairs.
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Brute Force Prime Check and Pair Generation

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