[AtCoder] D - Digit Sum|PSAtCoder|Problem Solving-Math

D - Digit Sum

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[AtCoder] D - Friction|PSAtCoder|Problem Solving-Dynamic Programming

D - Friction

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[AtCoder] C - AND Grid|PSAtCoder|Problem Solving-Ad-hoc

C - AND Grid

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[AtCoder] D - Teleporter|PSAtCoder|Problem Solving-BFS

D - Teleporter

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[Codeforces] Beta Round 22 (Div. 2 Only) C. System Administrator|PSCodeforces|Problem Solving-Graph Theory

Codeforces Beta Round 22 (Div. 2 Only) C. System Administrator

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[Codeforces] Beta Round 29 (Div. 2, Codeforces format) C. Mail Stamps|PSCodeforces|Problem Solving-BFS-Bit Manipulation

Codeforces Beta Round 29 (Div. 2, Codeforces format) C. Mail Stamps

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[Codeforces] Beta Round 30 (Codeforces format) B. Codeforces World Finals|PSCodeforces|Problem Solving

Codeforces Beta Round 30 (Codeforces format) B. Codeforces World Finals

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[Codeforces] Beta Round 31 (Div. 2, Codeforces format) C. Schedule|PSCodeforces|Sorting-Problem Solving

Codeforces Beta Round 31 (Div. 2, Codeforces format) C. Schedule

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[Codeforces] Beta Round 32 (Div. 2, Codeforces format) C. Flea|PSCodeforces|Problem Solving-Math

Codeforces Beta Round 32 (Div. 2, Codeforces format) C. Flea

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[CS Academy] City Upgrades|PSCS Academy|Problem Solving-Binary Search

City Upgrades

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