THE YEAR PUZZLE (program by Heiner Marxen)
Version: $Revision: 1.18 $ $Date: 2006/02/01 17:22:10 $
Target signature = 2001
Without permutation of signature digits.
Intermediate (de)nominator range = -500000 .. 500000
Result range = 0 .. 200
With standard binary operators: + - * /
With standard  unary operators: - sqrt
With parentheses.
With concatenation.
With exponentiation (^).
With factorial (!).
With even/odd factorial (!!).
With decimal point.
Could not solve 132 of 201 values [65.7%].
     0 = 20*0*1
     1 = 20*0+1
     2 = 2+0+0*1
     3 = 2+0+0+1
     4 = 2+0!+0+1
     5 = 2+0!+0!+1
     6 = (2+0+0+1)!
     7 = (2+0!)!+0+1
     8 = 2^(0!+0!+1)
     9 = (2+0!)^(0!+1)
    10 = 20/(0!+1)
    11 = sqrt(((2+0!)!-0!)!+1)
    12 = 2*(0!+0!+1)!
    13 = 2+0!+0!/.1
    14 = ((2+0!)!-0!)!!-1
    15 = (2+0!+0!+1)!!
    16 = ((2+0!)!-0!)!!+1
    17 = (.2^(-0!))!!+0!+1
    18 = 20-0!-1
    19 = 20+0-1
    20 = 20+0*1
    21 = 20+0+1
    22 = 20+0!+1
    23 = (2+0!+0!)!-1
    24 = (2+0!+0+1)!
    25 = (2+0!+0!)!+1
    26 = .2^(-0!-0!)+1
    27 = ?
    28 = ?
    29 = ?
    30 = 20+0!/.1
    31 = ?
    32 = sqrt(2^(0!/0.1))
    33 = ?
    34 = ?
    35 = ?
    36 = (2+0!)!^(0!+1)
    37 = ?
    38 = ((2+0!)!)!!-0!/.1
    39 = ?
    40 = 20*(0!+1)
    41 = ?
    42 = ?
    43 = ?
    44 = ?
    45 = ?
    46 = ((2+0!)!)!!-0!-1
    47 = ((2+0!)!)!!+0-1
    48 = ((2+0+0+1)!)!!
    49 = ((2+0!)!)!!+0+1
    50 = 2+((0!+0!+1)!)!!
    51 = ?
    52 = ?
    53 = ?
    54 = ?
    55 = ?
    56 = ?
    57 = ?
    58 = ((2+0!)!)!!+0!/.1
    59 = ?
    60 = (2+0!)!/0.1
    61 = ?
    62 = ?
    63 = ?
    64 = 2^(0!+0!+1)!
    65 = ?
    66 = ?
    67 = ?
    68 = ?
    69 = ?
    70 = ((2+0!)!+0!)/.1
    71 = sqrt(((2+0!)!+0!)!+1)
    72 = ((2+0!)!)!*0.1
    73 = ?
    74 = ?
    75 = ?
    76 = ?
    77 = ?
    78 = ?
    79 = ?
    80 = (-.2+0!)/.01
    81 = ?
    82 = ?
    83 = ?
    84 = ?
    85 = ?
    86 = ?
    87 = ?
    88 = ?
    89 = ?
    90 = ?
    91 = ?
    92 = ?
    93 = ?
    94 = ?
    95 = ?
    96 = 2*((0!+0!+1)!)!!
    97 = ?
    98 = -2+0!/.01
    99 = ?
   100 = 2^0/.01
   101 = ?
   102 = 2+0!/.01
   103 = ?
   104 = ((2+0!)!+0!)!!-1
   105 = ((2+0!)!+0+1)!!
   106 = ((2+0!)!+0!)!!+1
   107 = ?
   108 = (.2^(-0!))!*(0!-.1)
   109 = ?
   110 = (.2^(-0!))!-0!/.1
   111 = ?
   112 = ?
   113 = ?
   114 = ?
   115 = ?
   116 = ?
   117 = ?
   118 = (.2^(-0!))!-0!-1
   119 = ((2+0!)!-0!)!-1
   120 = (2+0!+0!+1)!
   121 = ((2+0!)!-0!)!+1
   122 = (.2^(-0!))!+0!+1
   123 = ?
   124 = ?
   125 = .2^(-0!-0!-1)
   126 = ?
   127 = ?
   128 = ?
   129 = ?
   130 = (.2^(-0!))!+0!/.1
   131 = ?
   132 = (.2^(-0!))!*(0!+.1)
   133 = ?
   134 = ?
   135 = ?
   136 = ?
   137 = ?
   138 = ?
   139 = ?
   140 = ((.2^(-0!))!!-0!)/.1
   141 = ?
   142 = ?
   143 = ?
   144 = .2*((0!+0!+1)!)!
   145 = ?
   146 = ?
   147 = ?
   148 = ?
   149 = ?
   150 = (.2^(-0!))!!/0.1
   151 = ?
   152 = ?
   153 = ?
   154 = ?
   155 = ?
   156 = ?
   157 = ?
   158 = ?
   159 = ?
   160 = ((.2^(-0!))!!+0!)/.1
   161 = ?
   162 = ?
   163 = ?
   164 = ?
   165 = ?
   166 = ?
   167 = ?
   168 = ?
   169 = ?
   170 = ?
   171 = ?
   172 = ?
   173 = ?
   174 = ?
   175 = ?
   176 = ?
   177 = ?
   178 = ?
   179 = ?
   180 = ?
   181 = ?
   182 = ?
   183 = ?
   184 = ?
   185 = ?
   186 = ?
   187 = ?
   188 = ?
   189 = .2*(-0!+0!/.1)!!
   190 = (20-0!)/.1
   191 = ?
   192 = ?
   193 = ?
   194 = ?
   195 = ?
   196 = ?
   197 = ?
   198 = ?
   199 = 200-1
   200 = 200*1