MONKEY JUMP

The monkey is located on the numeric axis at the point with coordinate $x_0$. Having nothing else to do he starts jumping between integer points on the axis. Making a jump from a point with coordinate $x$ with a distance $d$ to the left moves the monkey to a point with a coordinate $x$−$d$, while jumping to the right moves him to a point with a coordinate $x$+$d$. The monkey is very fond of po