[Hacker Earth] Numbers in a range|PSHacker Earth|Problem Solving-Combinatorics

Numbers in a range

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[Hacker Earth] One and only flow|PSHacker Earth|Problem Solving-Graph Theory

One and only flow

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[Hacker Earth] Students and their arrangements <CAST>|PSHacker Earth|Sorting-Problem Solving-Union Find

Students and their arrangements

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[Hacker Earth] AND operation|PSHacker Earth|Problem Solving-Bit Manipulation-Prefix Sum

AND operation

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[Hacker Earth] Group Range|PSHacker Earth|Problem Solving-Union Find

Group Range

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[Codeforces] Educational Round 80 (Rated for Div. 2) D. Minimax Problem|PSCodeforces|Problem Solving-BFS-Binary Search-Bit Manipulation

Educational Codeforces Round 80 (Rated for Div. 2) D. Minimax Problem

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[Codeforces] Educational Round 80 (Rated for Div. 2) E. Messenger Simulator|PSCodeforces|Fenwick Tree-Problem Solving-Offline Query Technique-Lazy Evaluation Technique

Educational Codeforces Round 80 (Rated for Div. 2) E. Messenger Simulator

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[Codeforces] Round 615 (Div. 3) F. Three Paths on a Tree|PSCodeforces|Problem Solving-DFS

Codeforces Round 615 (Div. 3) F. Three Paths on a Tree

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[Codeforces] Round 617 (Div. 3) E2. String Coloring (hard version)|PSCodeforces|Problem Solving-Greedy-Bit Manipulation

Codeforces Round 617 (Div. 3) E2. String Coloring (hard version)

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[Codeforces] Round 619 (Div. 2) D. Time to Run|PSCodeforces|Problem Solving-Greedy

Codeforces Round 619 (Div. 2) D. Time to Run

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