Codeforces Beta Round 14 (Div. 2)

5 problems from Codeforces Beta Round 14 (Div. 2) (contest 14), difficulty 800-1900. 5/5 solutions verified against sample I/O.

5 items

Codeforces Beta Round 14 (Div. 2)

Div. 2 | 5 problems | 5/5 verified | Difficulty 800-1900 | 7m 42s

# Problem Rating Tags Accepted Time ✓
A Letter 800 implementation 12,391 1m 8s ✓
B Young Photographer 1000 implementation 8,301 1m 20s ✓
C Four Segments 1700 brute-force, constructive-algorithms, geometry 3,857 1m 48s ✓
D Two Paths 1900 dfs-and-similar, dp, graphs 5,282 1m 27s ✓
E Camels 1900 dp 2,060 1m 59s ✓
Practice › Codeforces Solutions › Codeforces Beta Round 14 (Div. 2) ›

CF 14A - Letter

We are given a rectangular grid representing a sheet of graph paper with _n_ rows and _m_ columns. Some of the squares are shaded, marked by *, and the rest are unshaded, marked by ..
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CF 14B - Young Photographer

The problem asks us to determine how far Bob, a photographer, must move along a straight racetrack to take pictures of every sportsman. Each sportsman runs back and forth along a fixed segment of the racetrack, defined by two positions ai and bi.
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CF 14C - Four Segments

We are given exactly four line segments on the 2D plane. Every segment is axis-aligned, or may even degenerate into a single point.
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CF 14D - Two Paths

We are given a tree of n cities, meaning each city is connected in such a way that there is exactly one simple path between any two cities. Roads are undirected, and each road has a length of 1.
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CF 14E - Camels

We are counting sequences of heights that describe a polyline. The x-coordinates are fixed as 1, 2, ..., n, so the whole shape is determined only by the sequence y1, y2, ..., yn.
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