NK landscape: N = 20, K = 4, random neighbors, drawn from seed 1
the optimum, over all 2^20 strings: 0.742541 at 10101011100001100010
iterated local search from seed 1
evaluations  best
          1  0.495078
          3  0.543267
          7  0.556021
          8  0.617134
         18  0.619018
         20  0.625517
         21  0.650122
         31  0.691331
         32  0.701480
         46  0.723895
        171  0.735152
        907  0.736484
        927  0.742541
0.742541 after 927 evaluations, at 10101011100001100010

landscape  optimum   ILS reaches  median evaluations  GA reaches
        1  0.742541        20/20              1952.0       20/20
        2  0.768337        20/20              2909.5        5/20
        3  0.811498        20/20              3209.0       19/20
        4  0.787638        20/20              1109.0       20/20
        5  0.777704        20/20              4910.0        6/20
