THE YEAR PUZZLE (program by Heiner Marxen)
Version: $Revision: 1.18 $ $Date: 2006/02/01 17:22:10 $
Target signature = 2002
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 114 of 201 values [56.7%].
     0 = 20*0*2
     1 = 2/(0+0+2)
     2 = 20*0+2
     3 = 20^0+2
     4 = 2+0+0+2
     5 = 2+0!+0+2
     6 = 2+0!+0!+2
     7 = 2^0+(0!+2)!
     8 = 2^(0!+0+2)
     9 = (2+0!+0)^2
    10 = 20/(0+2)
    11 = (2+0!)!+0!/.2
    12 = 2*(0!+0+2)!
    13 = ((2+0!)!-0!)!!-2
    14 = 20-(0!+2)!
    15 = (2+0!+0+2)!!
    16 = 2^(0!+0!+2)
    17 = 20-0!-2
    18 = 20+0-2
    19 = 20+0!-2
    20 = 20+0*2
    21 = 20+0!^2
    22 = 20+0+2
    23 = 20+0!+2
    24 = (2+0+0+2)!
    25 = ((2+0!)!-0!)^2
    26 = 20+(0!+2)!
    27 = (2+0!)^(0!+2)
    28 = -20+((0!+2)!)!!
    29 = ?
    30 = ((2+0!)!-0!)!!*2
    31 = ?
    32 = 2^(-0!+(0!+2)!)
    33 = ((2+0!)!)!!-(0!/.2)!!
    34 = ?
    35 = 20+(0!/.2)!!
    36 = (2+0!+0)!^2
    37 = ?
    38 = (20-0!)*2
    39 = ?
    40 = 20*(0+2)
    41 = ?
    42 = (20+0!)*2
    43 = ((2+0!)!)!!-0!/.2
    44 = ?
    45 = ((2+0!)!)!!-0!-2
    46 = ((2+0!)!)!!+0-2
    47 = ((2+0!)!)!!+0!-2
    48 = 2*(0!+0!+2)!
    49 = ((2+0!)!+0!)^2
    50 = 2+((0!+0+2)!)!!
    51 = 2+0!+((0!+2)!)!!
    52 = 2+0!/.02
    53 = ((2+0!)!)!!+0!/.2
    54 = ((2+0!)!)!!+(0!+2)!
    55 = sqrt((.2^(-0!))!+0!)/.2
    56 = ?
    57 = ?
    58 = ?
    59 = ?
    60 = 20*(0!+2)
    61 = ?
    62 = ?
    63 = ((2+0!)!)!!+(0!/.2)!!
    64 = 2^(0!+0+2)!
    65 = ?
    66 = ?
    67 = ?
    68 = 20+((0!+2)!)!!
    69 = ?
    70 = ((.2^(-0!))!!-0!)/.2
    71 = ?
    72 = -((2+0!)!)!!+(0!/.2)!
    73 = ?
    74 = ?
    75 = (.2^(-0!))!!/0.2
    76 = ?
    77 = ?
    78 = ?
    79 = ?
    80 = ((.2^(-0!))!!+0!)/.2
    81 = ?
    82 = ?
    83 = ?
    84 = ?
    85 = ?
    86 = ?
    87 = ?
    88 = ?
    89 = ?
    90 = (2+0!)!*(0!/.2)!!
    91 = ?
    92 = ?
    93 = ?
    94 = (((2+0!)!)!!-0!)*2
    95 = (20-0!)/.2
    96 = 2*((0!+0+2)!)!!
    97 = ?
    98 = 2*(0!+((0!+2)!)!!)
    99 = ?
   100 = 200/2
   101 = ?
   102 = ?
   103 = ((2+0!)!+0!)!!-2
   104 = ?
   105 = (2^0+(0!+2)!)!!
   106 = ?
   107 = 2+(0!+(0!+2)!)!!
   108 = ?
   109 = ?
   110 = ?
   111 = ?
   112 = ?
   113 = ?
   114 = -(2+0!)!+(0!/.2)!
   115 = (.2^(-0!))!-0!/.2
   116 = ?
   117 = -2-0!+(0!/.2)!
   118 = ((2+0!)!-0!)!-2
   119 = -2^0+(0!/.2)!
   120 = 20*(0!+2)!
   121 = 2^0+(0!/.2)!
   122 = ((2+0!)!-0!)!+2
   123 = 2+0!+(0!/.2)!
   124 = ?
   125 = .2^(0-0!-2)
   126 = (2+0!)!+(0!/.2)!
   127 = ?
   128 = 2^(0!+(0!+2)!)
   129 = ?
   130 = ?
   131 = ?
   132 = ?
   133 = ?
   134 = ?
   135 = (.2^(-0!))!!+(0!/.2)!
   136 = ?
   137 = ?
   138 = ?
   139 = ?
   140 = 20+(0!/.2)!
   141 = ?
   142 = ?
   143 = ?
   144 = ((2+0!)!)!!*(0!+2)
   145 = ?
   146 = ?
   147 = ?
   148 = ?
   149 = ?
   150 = (2+0!)/.02
   151 = ?
   152 = ?
   153 = ?
   154 = ?
   155 = ?
   156 = ?
   157 = ?
   158 = ?
   159 = ?
   160 = ?
   161 = ?
   162 = ?
   163 = ?
   164 = ?
   165 = ?
   166 = ?
   167 = ?
   168 = ((2+0!)!)!!+(0!/.2)!
   169 = ?
   170 = ?
   171 = ?
   172 = ?
   173 = ?
   174 = ?
   175 = ?
   176 = ?
   177 = ?
   178 = ?
   179 = ?
   180 = ?
   181 = ?
   182 = ?
   183 = ?
   184 = ?
   185 = ?
   186 = ?
   187 = ?
   188 = ?
   189 = ?
   190 = ?
   191 = ?
   192 = ((2+0!+0!)!!)!!/2
   193 = ?
   194 = ?
   195 = ?
   196 = ((.2^(-0!))!!-0!)^2
   197 = ?
   198 = 200-2
   199 = ?
   200 = sqrt(200^2)