Codeforces Round 254 (Div. 2)

2 problems from Codeforces Round 254 (Div. 2) (contest 445), difficulty 1200-1400. 2/2 solutions verified against sample I/O.

2 items

Codeforces Round 254 (Div. 2)

Div. 2 | 2 problems | 2/2 verified | Difficulty 1200-1400 | 3m 10s

#	Problem	Rating	Tags	Accepted	Time	✓
A	DZY Loves Chessboard	1200	dfs-and-similar, implementation	33,654	1m 21s	✓
B	DZY Loves Chemistry	1400	dfs-and-similar, dsu, greedy	14,750	1m 49s	✓

Practice › Codeforces Solutions › Codeforces Round 254 (Div. 2) ›

CF 445B - DZY Loves Chemistry

The chemicals and reactions form an undirected graph. Each vertex represents a chemical, and an edge between two vertices means those two chemicals react. We start with danger equal to 1. Chemicals are poured one at a time in any order.

Practice › Codeforces Solutions › Codeforces Round 254 (Div. 2) ›

CF 445A - DZY Loves Chessboard

We are given a chessboard represented as an n by m grid where each cell is either good or bad. A good cell is indicated by a "." and a bad cell by a "-".