L1. Explain your approach: Clearly explain the intuition behind using two pointers and how they help solve the problem efficiently. Feb 8, 2024 · The two-pointer technique is a pattern where two pointers iterate over the data structure in together or separately until they satisfy a certain condition. I’ll do my best to explain it in a simple way and leave you with Nov 24, 2023 · Fast and slow pointers are a common pattern used in algorithmic problem-solving, particularly in linked list and two-pointer problems. You may assume that each input would have exactly one solution, and you may not use the same element twice. This is because two pointers can easily track the start and end of the window. Handle edge cases: Always consider edge cases such as empty lists or lists with only one or two nodes. Numerical approximation of diffraction pattern from a slit of width four wavelengths with an incident plane wave. This is why the two-pointer technique is efficient. com/channel/UCT-S2ngqEBoYCM5UKuNeELg/ Jul 26, 2025 · Two pointers is a pattern where you use two indices (or “pointers”) to traverse an array — either from both ends or from the same direction — to solve a problem more efficiently than brute force.

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