1
vote
0answers
55 views

Door game between alice and bob

Alice and Bob are taking a walk in the Land Of Doors which is a magical place having a series of N adjacent doors that are either open or close. After a while they get bored and decide to do ...
2
votes
1answer
43 views

Coin-tossing games

Suppose that you start off with $100$ dollars. You toss a coin $10$ times and guess it right $5$ times and lose $5$ times (the order of the outcomes is not known). It is known that every time you ...
-1
votes
1answer
247 views

Finding winner of flipping game

Alice and Bob play a game with N non-negative integers. Players take successive turns, and in each turn, they are allowed to flip active bits from any of the integers in the list. That is, they ...
-1
votes
1answer
189 views

Number of ways to win chocolate game

Alice and Bob are playing a game. They have N containers each having one or more chocolates. Containers are numbered from 1 to N, where ith container has A[i] number of chocolates. The game goes like ...
0
votes
2answers
393 views

Game of cards and GCD

Alice and Bob play the game. The rules are as follows: Initially, there are n cards on the table, each card has a positive integer written on it. At the beginning Alice writes down the number 0 on ...
3
votes
0answers
52 views

News on SG values of Grundy's Game?

Is there any recent research into the Sprague-Grundy values of Grundy's game? It was calculated to $2^{35}$ integers but with no sight of recurrence. Has anyone come up with anything new to compute ...
0
votes
0answers
52 views

Rectangle over rectangle

Given N rectangles cut out of paper. The rectangles are labeled 0 through N-1.I am having given int[]s X and Y with N elements each. For each i, the sides of rectangle i have lengths X[i] and Y[i]. ...
5
votes
2answers
277 views

Nim addition- binary addition without carrying

A nim addition table is essentially created by putting, in any cell, the smallest number not to the left of the cell and not above that cell in its column. However, I know for a fact that nim addition ...
1
vote
1answer
403 views

Is there a winning strategy for this game?

Andy and Bob play a game using a long straight row of squares, alternating turns. When it’s Andy’s turn, he writes an A in one of the blank squares. When Bob takes a turn, he writes a B in some blank ...