[Codeforces] Round #443 (Div. 1) A. Short Program|PSCodeforces|Problem Solving-Bit Manipulation

Codeforces Round #443 (Div. 1) A. Short Program

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[Codeforces] Educational Round 32 D. Almost Identity Permutations|PSCodeforces|Problem Solving-Combinatorics

Educational Codeforces Round 32 D. Almost Identity Permutations

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[Codeforces] Round #451 (Div. 2) D. Alarm Clock|PSCodeforces|Problem Solving-Sliding Window

Codeforces Round #451 (Div. 2) D. Alarm Clock

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[Codeforces] Round #451 (Div. 2) E. Squares and not squares|PSCodeforces|Problem Solving-Heap-Greedy

Codeforces Round #451 (Div. 2) E. Squares and not squares

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[Codeforces] Round #454 (Div. 1, based on Technocup 2018 Elimination Round 4) A. Shockers|PSCodeforces|Problem Solving-Hash Table

Codeforces Round #454 (Div. 1, based on Technocup 2018 Elimination Round 4) A. Shockers

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[LeetCode] Unique Number of Occurrences|PSLeetCode|Problem Solving-Hash Table

1207. Unique Number of Occurrences

Given an array of integers arr, return true if the number of occurrences of each value in the array is unique, or false otherwise.

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[CodeChef] Sum and GCD|PSCodeChef|Problem Solving-Euclidean Algorithm

Sum and GCD

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[CodeChef] XOR Folding|PSCodeChef|Problem Solving-Bit Manipulation

XOR Folding

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[CodeChef] A Plus B Again!|PSCodeChef|Problem Solving-Math

A Plus B Again!

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[CodeChef] The Great Wall of Byteland|PSCodeChef|Problem Solving-Numeric Theory

The Great Wall of Byteland

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