1 1 toothpicks, two people can smoke, and only 1 or two toothpicks can be smoked at a time. The person who draws the last-kill asks which life opportunity.

A first draw 1.

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After that, draw b 1 every time. A, just draw two. B draws 2, A draws 1. ~ In this way, the fourth draw of A will definitely draw 10, which means that B has no choice but to draw 1 1. . ~

According to the formula.

The extraction number of a is 1, 3X+ 1, and x is the extraction number.

That is to say, if the total is odd, the last one must be drawn. The total number is even, and the first one must draw the last one.