Codeforces Round 691 (Div. 2)

Solutions for Codeforces Round 691 (Div. 2) (contest 1459). 2/2 problems verified against sample I/O. Difficulty range: 800-1300.

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Codeforces Round 691 (Div. 2)

Type: Div. 2 | Problems: 2 | Verified: 2/2 | Rating range: 800-1300 | Time: 3m 2s

Problem	Name	Rating	Tags	Solve Time	Verified
A	Red-Blue Shuffle	800	math, probabilities	1m 23s	✓
B	Move and Turn	1300	dp, math	1m 39s	✓

Practice › Codeforces Solutions › Codeforces Round 691 (Div. 2) ›

CF 1459B - Move and Turn

The robot starts at (0, 0) and makes exactly n moves. Every move has length 1. The first move may be in any cardinal direction. After that, the robot is forced to alternate between vertical and horizontal movement.

Practice › Codeforces Solutions › Codeforces Round 691 (Div. 2) ›

CF 1459A - Red-Blue Shuffle

We are given a set of n cards, each with two digits: one red and one blue. After shuffling all the cards randomly, we read the red digits from left to right to form a number R and the blue digits similarly to form B.