[AtCoder] E - Defect-free Squares|PSAtCoder|Problem Solving-Binary Search-Prefix Matrix

E - Defect-free Squares

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[AtCoder] D - Peaceful Teams|PSAtCoder|Problem Solving-Dynamic Programming-Combinatorics-Bit Manipulation

D - Peaceful Teams

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[Codeforces] Round 516 (Div. 1, by Moscow Team Olympiad) C. Dwarves, Hats and Extrasensory Abilities|PSCodeforces|Problem Solving-Binary Search-Greedy-Geometry

Codeforces Round 516 (Div. 1, by Moscow Team Olympiad) C. Dwarves, Hats and Extrasensory Abilities

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[Codeforces] Round 513 by Barcelona Bootcamp (rated, Div. 1 + Div. 2) D. Social Circles|PSCodeforces|Problem Solving-Greedy

Codeforces Round 513 by Barcelona Bootcamp (rated, Div. 1 + Div. 2) D. Social Circles

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[Codeforces] Round 518 (Div. 1) [Thanks, Mail.Ru!] A. Array Without Local Maximums|PSCodeforces|Problem Solving-Dynamic Programming

Codeforces Round 518 (Div. 1) Thanks, Mail.Ru! A. Array Without Local Maximums

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[Codeforces] Educational Round 54 (Rated for Div. 2) E. Vasya and a Tree|PSCodeforces|Problem Solving-DFS-Prefix Sum

Educational Codeforces Round 54 (Rated for Div. 2) E. Vasya and a Tree

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[Codeforces] Round 521 (Div. 3) F1. Pictures with Kittens (easy version)|PSCodeforces|Problem Solving-Dynamic Programming

Codeforces Round 521 (Div. 3) F1. Pictures with Kittens (easy version)

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[CS Academy] IOI Selection|PSCS Academy|Sorting-Problem Solving-Two Pointer

IOI Selection

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[CS Academy] Infinity War|PSCS Academy|Problem Solving-Game Theory

Infinity War

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[CS Academy] K Inversions|PSCS Academy|Fenwick Tree-Problem Solving-Math-Binary Search-Combinatorics

K Inversions

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