Introduction to Competitive Programming · USACO Guide

USACO. The USA Computing Olympiad is a national programming competition that occurs four times a year, with December, January, February, and US Open (March) contests. The regular contests are four hours long, and the US Open is five hours long. Each contest contains three problems. Solutions are evaluated and scored against a set of predetermined test cases.

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Solution

A free collection of curated, high-quality competitive programming resources to take you from USACO Bronze to USACO Platinum and beyond. Written by top USACO Finalists, these tutorials will guide you through your competitive programming journey.

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Solution

Official Analysis. Explanation. We can create a graph where the cells of the field are vertices and two adjacent fields are connected by an edge. To find the connected component with at least ⌈ N 2 2 ⌉ lceilfrac{N^2}{2}rceil ⌈ 2 N 2 ⌉ vertices, we can use DSU to keep track of the components and add edges in increasing order of cost until we have a connected component that covers at ...

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Using This Guide · USACO Guide

Skipping around is especially recommended for higher level contestants (Gold/Platinum). Feel free to mark a module as "Skipped" and come back to it at a later time! For lower level contestants, the guide is generally * designed to be completed in order. However, feel free to skip certain modules and come back to it later.

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USACO Silver: Triangle

I'm kind of confused with the solution explanation for the Triangle problem in USACO 2020 February Contest, Silver. I know that it has to deal with psum's, but I don't know how to optimize my code from O(N^2) to O(nlog(n)) to solve all of the test cases. Any help or explanation would be great. Thanks!

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Two Pointers · USACO Guide

Solution - Books. We want to find the longest contiguous segment of books that can be read within t t t minutes.. To accomplish this, we can define left texttt{left} left and right texttt{right} right to represent the beginning and end of the segment. Both will start at …

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A free collection of curated, high-quality competitive programming resources to take you from USACO Bronze to USACO Platinum and beyond. Written by top USACO Finalists, these tutorials will guide you through your competitive …

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