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Contests/Codeforces/Codeforces Round 947/B. 378QAQ and Mocha's Array
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Codeforces Round 947

B. 378QAQ and Mocha's Array

ArraySortingGreedy
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Solve on Codeforces

Problem Statement

Official algorithmic problem description and constraints.

Open on Codeforces

Mocha likes arrays, so before her departure, 378QAQ gave her an array π‘Ž consisting of π‘› positive integers as a gift.

Mocha thinks that π‘Ž is beautiful if there exist two numbers π‘– and π‘— (1≀𝑖,𝑗≀𝑛, π‘–≠𝑗) such that for all π‘˜ (1β‰€π‘˜β‰€π‘›), π‘Žπ‘˜ is divisible by either π‘Žπ‘– or π‘Žπ‘—.

Determine whether π‘Ž is beautiful. π‘₯ is divisible by π‘¦ if there exists an integer π‘§ such that π‘₯=𝑦⋅𝑧.

Solutions & Walkthrough

Detailed video explanations, mathematical intuition, and clean C++ implementation code.

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