XXIII Spain Olympiad in Informatics, Online Qualifier 1

4 problems from XXIII Spain Olympiad in Informatics, Online Qualifier 1 (contest 105457), difficulty -. 2/4 solutions verified against sample I/O.

4 items

XXIII Spain Olympiad in Informatics, Online Qualifier 1

Special | 4 problems | 2/4 verified | Difficulty - | 5m 41s

#	Problem	Time	✓
A	Words	1m 39s
B	Islands and Mountains	1m 18s	✓
C	Schedules	1m 11s	✓
D	Pickle Rick	1m 33s

Practice › Codeforces Solutions › XXIII Spain Olympiad in Informatics, Online Qualifier 1 ›

CF 105457D - Pickle Rick

We are working on an infinite grid where each cell is a unit square. A 1×1×2 cuboid starts in a fixed initial configuration at the origin, and it moves by rolling over one of its edges, like a domino flipping from one face to another. Each such roll counts as one move.

Practice › Codeforces Solutions › XXIII Spain Olympiad in Informatics, Online Qualifier 1 ›

CF 105457B - Islands and Mountains

We are given a line of land split into $n$ consecutive segments, each with a fixed height. Over time, the sea level rises in steps, and after each rise we must determine how many connected groups of dry land remain.

Practice › Codeforces Solutions › XXIII Spain Olympiad in Informatics, Online Qualifier 1 ›

CF 105457C - Schedules

We are given a list of class schedules, each represented by a start time and an end time on a single circular day that has m discrete hours.

Practice › Codeforces Solutions › XXIII Spain Olympiad in Informatics, Online Qualifier 1 ›

CF 105457A - Words

We are given multiple independent test cases. Each test case consists of two strings of equal length, and some positions in both strings may contain unknown characters represented by a question mark.