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Educational Codeforces Round 66 (Rated for Div. 2) C. Electrification

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[Codeforces] Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) C1. Heidi and the Turing Test (Easy)|PSCodeforces|Problem Solving-Greedy-Geometry

Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) C1. Heidi and the Turing Test (Easy)

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[Codeforces] Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) D1. Parallel Universes (Easy)|PSCodeforces|Problem Solving-Math

Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) D1. Parallel Universes (Easy)

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[Codeforces] Round #572 (Div. 1) A1. Add on a Tree|PSCodeforces|Problem Solving-Graph Theory

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[Codeforces] Round #576 (Div. 1) A. MP3|PSCodeforces|Problem Solving-Two Pointer

Codeforces Round #576 (Div. 1) A. MP3

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[InterviewBit] Mother Vertex|PSInterviewBit|Problem Solving-DFS

Mother Vertex

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[InterviewBit] Array Sum|PSInterviewBit|Problem Solving-Math

Array Sum

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[InterviewBit] Last Node in a Complete Binary Tree|PSInterviewBit|Problem Solving-DFS

Last Node in a Complete Binary Tree

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[InterviewBit] Potions|PSInterviewBit|Problem Solving-Dynamic Programming

Potions

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[InterviewBit] Self Permutation|PSInterviewBit|Problem Solving-Hash Table

Self Permutation

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