Codeforces Beta Round 12 (Div 2 Only)

5 problems from Codeforces Beta Round 12 (Div 2 Only) (contest 12), difficulty 800-2400. 5/5 solutions verified against sample I/O.

5 items

Codeforces Beta Round 12 (Div 2 Only)

Beta | 5 problems | 5/5 verified | Difficulty 800-2400 | 6m 41s

#	Problem	Rating	Tags	Accepted	Time	✓
A	Super Agent	800	implementation	15,422	1m 15s	✓
B	Correct Solution?	1100	implementation, sortings	9,669	1m 19s	✓
C	Fruits	1100	greedy, implementation, sortings	7,351	1m 2s	✓
D	Ball	2400	data-structures, sortings	2,885	1m 52s	✓
E	Start of the session	2100	constructive-algorithms	1,451	1m 13s	✓

Practice › Codeforces Solutions › Codeforces Beta Round 12 (Div 2 Only) ›

CF 12A - Super Agent

We are asked to check whether a password entered on a 3×3 keypad is symmetric with respect to its central button. The keypad is represented as a 3×3 grid of characters, where "X" indicates a pressed button and "." indicates an unpressed one.

Practice › Codeforces Solutions › Codeforces Beta Round 12 (Div 2 Only) ›

CF 12B - Correct Solution?

Alice gives Bob a decimal number and asks him to rearrange its digits so that the resulting number is as small as possible, while still being a valid decimal number without leading zeroes.

Practice › Codeforces Solutions › Codeforces Beta Round 12 (Div 2 Only) ›

CF 12C - Fruits

Valera has a shopping list containing a number of fruits, possibly with duplicates if he wants more than one of the same type. At the market, the stall has _n_ types of fruits and _n_ price tags, but the tags are not yet attached to the fruits.

Practice › Codeforces Solutions › Codeforces Beta Round 12 (Div 2 Only) ›

CF 12E - Start of the session

We are asked to construct a square matrix of size _n_ × _n_, where _n_ is an even number. The matrix must satisfy four properties. The main diagonal contains only zeroes.