[AtCoder] D - Squirrel Merchant|PSAtCoder|Problem Solving-Knapsack

D - Squirrel Merchant

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[AtCoder] E - Common Subsequence|PSAtCoder|Problem Solving-Dynamic Programming

E - Common Subsequence

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[AtCoder] F - Must Be Rectangular!|PSAtCoder|Problem Solving-Combinatorics-Union Find

F - Must Be Rectangular!

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[AtCoder] E - Hopscotch Addict|PSAtCoder|Problem Solving-BFS

E - Hopscotch Addict

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[Codeforces] Beta Round #62 B. Energy exchange|PSCodeforces|Problem Solving-Binary Search

Codeforces Beta Round #62 B. Energy exchange

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[Codeforces] Beta Round #64 B. Text Messaging|PSCodeforces|Problem Solving-Greedy

Codeforces Beta Round #64 B. Text Messaging

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[Codeforces] Beta Round #65 (Div. 2) C. Round Table Knights|PSCodeforces|Problem Solving-Math

Codeforces Beta Round #65 (Div. 2) C. Round Table Knights

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[Codeforces] Beta Round #66 A. The Elder Trolls IV: Oblivon|PSCodeforces|Problem Solving-Math-Greedy

Codeforces Beta Round #66 A. The Elder Trolls IV: Oblivon

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[Codeforces] Beta Round #67 (Div. 2) C. Modified GCD|PSCodeforces|Problem Solving-Binary Search-Numeric Theory

Codeforces Beta Round #67 (Div. 2) C. Modified GCD

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[CodeChef] Bogosort|PSCodeChef|Problem Solving-Math

Bogosort

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