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November 2nd, 2010, 03:19 PM
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Nim game

This is what is excepted: The name of the game is Nim. This is a well-known game with a number of variants. We will consider the following variant, which has an interesting winning strategy. Two players alternately take marbles from a pile. In each move, a player chooses how many marbles to take. The player must take at least one but at most half of the marbles. Then the other player takes a turn. The player who takes the last marble loses.

Write a program in which the computer plays against a human opponent. Generate a random integer between 10 and 100 to denote the initial size of the pile. Generate a random integer between 0 and 1 to decide whether the computer plays smart or stupid. In stupid mode, the computer simply takes a random legal value (between 1 and n/2) from the pile whenever it has a turn. In smart mode the computer takes off enough marbles to make the size of the pile a power of two minus 1- that is, 3, 7,15,31, or 63. That is always a legal move, except if the size of the pile is currently one. less then a power of 2. In that case, the computer makes a random legal move.

Note that the computer cannot be beaten in smart mode when it has the first move, unless the pile size happens to be 15, 31, or 63. Of course, a human player who gets the first turn and knows the winning strategy can win against the computer.

i have made all the random variables and decided to see if computer is on easy or hard mode, but i can't seem to figure out how to decipher turns?

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