codeN’ on Instagram: "👑 Celebrity Problem In a party of N people, a celebrity is someone who everyone knows — but they know no one! 😎 2 Pointer Approach: 1. Start with 2 people — if A knows B ➡️ A can’t be celebrity, move to B. Else ➡️ B can’t be celebrity, move to A. Repeat till one candidate left 💡 Then just verify if everyone knows them & they know no one 😎 ✅ Time Complexity: O(n) 👉 We make only one pass to find the potential celebrity (O(n)) and another pass to verify (O(n)), so total =
1:58
codeN’ on Instagram: "👑 Celebrity Problem In a party of N people, a celebrity is someone who everyone knows — but they know no one! 😎 2 Pointer Approach: 1. Start with 2 people — if A knows B ➡️ A can’t be celebrity, move to B. Else ➡️ B can’t be celebrity, move to A. Repeat till one candidate left 💡 Then just verify if everyone knows them & they know no one 😎 ✅ Time Complexity: O(n) 👉 We make only one pass to find the potential celebrity (O(n)) and another pass to verify (O(n)), so total =
27.2K views6 months ago
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