Codeforces Round 280 (Div. 2)

Solutions for Codeforces Round 280 (Div. 2) (contest 492). 1/3 problems verified against sample I/O. Difficulty range: 1400-2000.

3 items

Codeforces Round 280 (Div. 2)

Type: Div. 2 | Problems: 3 | Verified: 1/3 | Rating range: 1400-2000 | Time: 17m 42s

Problem	Name	Rating	Tags	Solve Time	Verified
C	Vanya and Exams	1400	greedy, sortings	57s	✓
D	Vanya and Computer Game	1800	binary-search, implementation, math	11m 25s	✗
E	Vanya and Field	2000	math	5m 20s	✗

Practice › Codeforces Solutions › Codeforces Round 280 (Div. 2) ›

CF 492C - Vanya and Exams

Vanya has a number of exams, each graded between 1 and a maximum score r. He wants his overall average to reach at least avg to qualify for a scholarship. For each exam, he can improve his score by writing essays, with the cost of increasing a grade by 1 point varying per exam.

Practice › Codeforces Solutions › Codeforces Round 280 (Div. 2) ›

CF 492D - Vanya and Computer Game

The game produces an infinite sequence of hits. Vanya attacks every $frac{1}{x}$ seconds, so his hits happen at times $$frac1x,frac2x,frac3x,dots$$ Vova attacks every $frac{1}{y}$ seconds, so his hits happen at times $$frac1y,frac2y,frac3y,dots$$ Whenever a hit occurs, it…

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CF 492E - Vanya and Field

Codeforces 492E: Vanya and Field