Computer Programming Contest Preparation

    1 Between 1 and 20, 18 generates the longest sequence of 20 values.
    2 Between 35 and 55, 54 generates the longest sequence of 112 values.
    3 Between 35 and 55, 54 generates the longest sequence of 112 values.
    4 Between 1 and 20, 18 generates the longest sequence of 20 values.
    5 Between 1 and 1, 1 generates the longest sequence of 3 values.
    6 Between 400 and 6000, 3711 generates the longest sequence of 237 values.
    7 Between 12143 and 943812, 837799 generates the longest sequence of 524 values.
    8 Between 1 and 2, 1 generates the longest sequence of 3 values.
    9 Between 1 and 10, 9 generates the longest sequence of 19 values.
   10 Between 5 and 5, 5 generates the longest sequence of 5 values.