[AtCoder] E - Permutation|PSAtCoder|Problem Solving-Dynamic Programming

E - Permutation

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[AtCoder] C - Tricolor Pyramid|PSAtCoder|Problem Solving-Math

C - Tricolor Pyramid

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[AtCoder] D - RGB Coloring 2|PSAtCoder|Problem Solving-Graph Theory-DFS-Union Find

D - RGB Coloring 2

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[AtCoder] E - Patisserie ABC 2|PSAtCoder|Problem Solving-Dynamic Programming

E - Patisserie ABC 2

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[Codeforces] Round #238 (Div. 2) C. Unusual Product|PSCodeforces|Problem Solving-Math

Codeforces Round #238 (Div. 2) C. Unusual Product

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[Codeforces] Round #239 (Div. 1) A. Triangle|PSCodeforces|Problem Solving-Geometry

Codeforces Round #239 (Div. 1) A. Triangle

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[Codeforces] Round #239 (Div. 1) B. Long Path|PSCodeforces|Problem Solving-Dynamic Programming

Codeforces Round #239 (Div. 1) B. Long Path

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[Codeforces] Coder-Strike 2014 - Qualification Round B. Multi-core Processor|PSCodeforces|Problem Solving-Hash Table-Simulation

Coder-Strike 2014 - Qualification Round B. Multi-core Processor

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[Codeforces] Round #241 (Div. 2) C. Booking System|PSCodeforces|Problem Solving-Heap

Codeforces Round #241 (Div. 2) C. Booking System

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[CodeChef] Not All Flavours|PSCodeChef|Problem Solving-Sliding Window

Not All Flavours

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