[AtCoder] F - Simplified Reversi|PSAtCoder|Problem Solving-Math-Binary Search

F - Simplified Reversi

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[Codeforces] Round #167 (Div. 2) D. Dima and Two Sequences|PSCodeforces|Problem Solving-Combinatorics

Codeforces Round #167 (Div. 2) D. Dima and Two Sequences

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[Codeforces] Round #174 (Div. 1) A. Cows and Sequence|PSCodeforces|Problem Solving-Math-Monotonic Stack-Prefix Sum-Simulation

Codeforces Round #174 (Div. 1) A. Cows and Sequence

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[Codeforces] Round #180 (Div. 1) B. Fish Weight|PSCodeforces|Problem Solving-Greedy

Codeforces Round #180 (Div. 1) B. Fish Weight

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[Codeforces] Round #184 (Div. 2) A. Strange Addition|PSCodeforces|Problem Solving-Greedy

Codeforces Round #184 (Div. 2) A. Strange Addition

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[Codeforces] Round #184 (Div. 2) C. Ivan and Powers of Two|PSCodeforces|Problem Solving-Math

Codeforces Round #184 (Div. 2) C. Ivan and Powers of Two

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[CodeChef] Fake Binary Search|PSCodeChef|Problem Solving-Binary Search

Fake Binary Search

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[CodeChef] Word Stem|PSCodeChef|Problem Solving-Back Tracking-Trie

Word Stem

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[CodeChef] Matrix XOR|PSCodeChef|Problem Solving-Bit Manipulation-Numeric Theory

Matrix XOR

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[CodeChef] Chef Goes Through Segments|PSCodeChef|Problem Solving-Simulation

Chef Goes Through Segments

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