Codeforces Beta Round 54 (Div. 2)

Solutions for Codeforces Beta Round 54 (Div. 2) (contest 58). 3/5 problems verified against sample I/O. Difficulty range: 1000-2400.

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Codeforces Beta Round 54 (Div. 2)

Type: Div. 2 | Problems: 5 | Verified: 3/5 | Rating range: 1000-2400 | Time: 7m 51s

Problem Name Rating Tags Solve Time Verified
A Chat room 1000 greedy, strings 1m 20s ✓
B Coins 1300 greedy 1m 51s ✗
C Trees 1800 brute-force 1m 13s ✓
D Calendar 2000 greedy, strings 1m 23s ✓
E Expression 2400 dp 2m 4s ✗
Practice › Codeforces Solutions › Codeforces Beta Round 54 (Div. 2) ›

CF 58A - Chat room

The problem asks whether Vasya, who typed a string of lowercase letters, effectively managed to say "hello". The goal is not to check if the typed string is exactly "hello", but whether we can remove some letters (possibly zero) to produce the sequence h, e, l, l, o in order.
codeforces competitive-programming greedy strings May 28, 2026
Practice › Codeforces Solutions › Codeforces Beta Round 54 (Div. 2) ›

CF 58B - Coins

We are given the value of the largest coin denomination, n. We must build a sequence of distinct coin values such that every larger coin is divisible by every smaller coin. Among all valid sequences, we want the one containing the maximum possible number of coins.
codeforces competitive-programming greedy May 28, 2026
Practice › Codeforces Solutions › Codeforces Beta Round 54 (Div. 2) ›

CF 58C - Trees

We are given a row of n trees, each with a certain height, and our task is to adjust some of their heights so that the row forms a “beautiful” sequence.
codeforces competitive-programming brute-force May 28, 2026
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CF 58D - Calendar

We are asked to construct a calendar from a list of city names. Each line of the calendar must contain exactly two city names separated by a given symbol, and all lines must have identical length. The calendar must use each city name exactly once.
codeforces competitive-programming greedy strings May 28, 2026
Practice › Codeforces Solutions › Codeforces Beta Round 54 (Div. 2) ›

CF 58E - Expression

We are given a string representing a simple arithmetic expression of the form a+b=c, where a, b, and c are integers.
codeforces competitive-programming dp May 28, 2026