BdOI Preliminary 2023

5 problems from BdOI Preliminary 2023 (contest 104178), difficulty -. 4/5 solutions verified against sample I/O.

5 items

BdOI Preliminary 2023

Special | 5 problems | 4/5 verified | Difficulty - | 3m 40s

# Problem Rating Tags Accepted Time ✓
A Success 42s ✓
B Moo 46s ✓
C Now-Or-Never 24s
D World 59s ✓
E Hunted 49s ✓
Practice › Codeforces Solutions › BdOI Preliminary 2023 ›

CF 104178C - Now-Or-Never

I’m missing the actual problem statement for “Codeforces 104178C - Now-Or-Never”, so I can’t reliably reconstruct the intended solution or write a correct editorial.
codeforces competitive-programming Jul 2, 2026
Practice › Codeforces Solutions › BdOI Preliminary 2023 ›

CF 104178D - World

We are given a sequence of points, each point having up to 10 coordinates. We must cut this sequence into several contiguous blocks. Every point belongs to exactly one block. For any block, its cost is defined as the largest L1 distance between any two points inside that block.
codeforces competitive-programming Jul 2, 2026
Practice › Codeforces Solutions › BdOI Preliminary 2023 ›

CF 104178E - Hunted

We are given a tree of cities. Two people start at two different nodes: one is the police, the other is you. Each second, both of you move simultaneously to an adjacent city or stay in place, and both have full knowledge of the tree.
codeforces competitive-programming Jul 2, 2026
Practice › Codeforces Solutions › BdOI Preliminary 2023 ›

CF 104178B - Moo

We are given a set of chickens, each with a positive weight. We also have a fixed number of biscuits. The goal is to distribute biscuits so that every chicken receives a nonnegative integer amount, and all chickens receive biscuits in strict proportion to their weights.
codeforces competitive-programming Jul 2, 2026
Practice › Codeforces Solutions › BdOI Preliminary 2023 ›

CF 104178A - Success

We are given the final marks of all students in a class. Your own mark is hidden, but you know one extra fact: your mark is not the maximum among all students. The rank of a student is defined as one plus the number of students who scored strictly higher.
codeforces competitive-programming Jul 2, 2026