Starting location _ _ _ _ _ _ _ _ 0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

The first 1 hop _ _ _ _ _ _ _ 0 _1_ _ _ _ _ _ _ _;

The second hop _ _ _ _ _ _ _-1_ 0 _1_ _ _ _ _ _ _ _;

The third hop _ _ _ _ _ _ _ _-1_1_ 2 _ _ _ _ _ _ _;

...............................

The 99th hop _ _-49 _ _-1_ 0 _1_ 2 _ _ _ _ _ _ _;

Jump 100

___-50_-49_......_ 1_0_ 1_2_....._50______。