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- Codeforces Beta Round #1 - Tutorial - Codeforces
Problem A The constraint that edges of each flagstone much be parralel to edges of the square allows to analyze X and Y axes separately, that is, how many segments of length 'a' are needed to cover segment of length 'm' and 'n' -- and take product of these two quantities Answer = ceil (m a) * ceil (n a), where ceil (x) is the least integer which is above or equal to x Using integers only
- Educational Codeforces Round 32 — Editorial
I liked this round Generally, the idea of educational rounds is very good That one in particular expanded my horizons Usually, when you learn MST, you think: "Why should I bother with Prim's or Boruvka's algo? Just learn Kruskal and forget about the rest" Task G reminds us that every algorithm is important and can have its own unique application
- Codeforces Round #383 editorial
KAN helped us preparing the round very much, we are thankful to him This table for each person and for each problem shows the number of the committed changes (in polygon) he has made in preparing the problem (it is good for showing how much someone was involved in preparing) I used Google Docs for writing everything
- Codeforces Round #364 problem analysis
Codeforces Programming competitions and contests, programming community I couldn't understand the analysis for problem E, so here is an explanation of my solution using a suffix array (19407933) for problem 700E - Cool Slogans: Let's call a good substring either a single character, or a substring starting and ending with a smaller good substring, with no other occurence of that smaller
- Codeforces Round #256 — Editorial
448A - Rewards Solution: 7139559 Because rewards of one type can be on one shelf, lets calculate number of cups — a and number of medals — b Minimum number of shelves that will be required for all cups can be found by formula (a + 5 - 1) 5 The same with shelves with medals: (b + 10 - 1) 10 If sum of this two values more than n then answer is "NO" and "YES" otherwise 448B - Suffix
- Codeforces Round 1132 (Div. 2) - Codeforces
I am thrilled to invite you to participate in Codeforces Round 1132 (Div 2), which will take place on Nov 06 2026 17:35 (Moscow time)and probably won't contain a single $$$\text{XOR}$$$ problem You will be given 6 problems, two of which will be divided into subtasks, and 2 hours and 15 minutesto solve them
- Educational Codeforces Round 67 Editorial
awoo's blog Educational Codeforces Round 67 Editorial By awoo, history, 7 years ago, translation, 1187A - Stickers and Toys Idea: MikeMirzayanov Tutorial
- Codeforces Round 1127 (Div. 1, Div. 2, Based on Mexican Olympiad in . . .
Francisco_Martin's blog Codeforces Round 1127 (Div 1, Div 2, Based on Mexican Olympiad in Informatics 2026) Editorial By Francisco_Martin, 5 weeks ago,
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