[10079] | 1 | /* The Royal Tree benchmark problem for GP */
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| 2 | /* See paper: William F. Punch, How Effective are Multiple Populations in Genetic Programming */
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[10423] | 3 | /* for max. depth 7 (level: g) this is hard to solve. */
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[10080] | 4 |
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[10079] | 5 | PROBLEM RoyalTree
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| 6 | CODE <<
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| 7 | const int MaxDepth = 7;
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| 8 | const double FullBonus = 2;
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| 9 | const double PartialBonus = 1;
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| 10 | const double Penalty = 1.0 / 3.0;
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| 11 | const double CompleteBonus = 2.0;
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| 12 | >>
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| 13 |
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| 14 | NONTERMINALS
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| 15 | S<<int depth, out double score, out char symb, out bool perfect>>.
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| 16 | A<<int depth, out double score, out char symb, out bool perfect>>.
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| 17 | B<<int depth, out double score, out char symb, out bool perfect>>.
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| 18 | C<<int depth, out double score, out char symb, out bool perfect>>.
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| 19 | D<<int depth, out double score, out char symb, out bool perfect>>.
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| 20 | E<<int depth, out double score, out char symb, out bool perfect>>.
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| 21 | F<<int depth, out double score, out char symb, out bool perfect>>.
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| 22 | G<<int depth, out double score, out char symb, out bool perfect>>.
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| 23 |
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| 24 | TERMINALS
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| 25 | X. Y. Z.
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| 26 |
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| 27 | RULES
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| 28 | S<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << perfect = false; if (depth <= 0) { score = 0.0; symb = ' '; return; } >>
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| 29 | A<<depth-1, out score, out symb, out perfect>>
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| 30 | | B<<depth-1, out score, out symb, out perfect>>
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| 31 | | C<<depth-1, out score, out symb, out perfect>>
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| 32 | | D<<depth-1, out score, out symb, out perfect>>
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| 33 | | E<<depth-1, out score, out symb, out perfect>>
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| 34 | | F<<depth-1, out score, out symb, out perfect>>
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| 35 | | G<<depth-1, out score, out symb, out perfect>> /* "... it is extremely difficult to climb to a level-f tree and we have never succeeded in climbing to level-g." */
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| 36 | | X SEM << symb = 'X'; score = 1; >>
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| 37 | | Y SEM << symb = 'Y'; score = 0; >>
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| 38 | | Z SEM << symb = 'Z'; score = 0; >>
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| 39 | .
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| 40 |
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| 41 | A<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 42 | double s;
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| 43 | bool p;
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| 44 | double w;
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| 45 | char c;
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| 46 | symb = 'A'; perfect = false;
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| 47 | >>
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| 48 | S<<depth, out s, out c, out p>> SEM << w = Penalty; if(c == 'X') { w = FullBonus; } >>
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| 49 | SEM << score = w * s; >>
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| 50 | SEM << if (c=='X') { perfect = true; score = CompleteBonus * score; } >>
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| 51 | .
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| 52 |
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| 53 | B<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 54 | double s0, s1;
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| 55 | bool p0, p1;
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| 56 | double w0, w1;
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| 57 | char c0 = ' '; char c1 = ' ';
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| 58 | symb = 'B'; perfect = false;
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| 59 | >>
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| 60 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'A') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 61 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'A') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 62 | SEM << score = w0 * s0 + w1 * s1; >>
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| 63 | SEM << if (c0=='A' && c1=='A' && p0 && p1) { perfect = true; score = CompleteBonus * score; } >>
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| 64 | .
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| 65 |
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| 66 | C<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 67 | double s0, s1, s2;
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| 68 | bool p0, p1, p2;
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| 69 | double w0, w1, w2;
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| 70 | char c0 = ' '; char c1 = ' '; char c2 = ' ';
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| 71 | symb = 'C'; perfect = false;
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| 72 | >>
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| 73 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'B') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 74 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'B') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 75 | S<<depth, out s2, out c2, out p2>> SEM << w2 = Penalty; if(c2 == 'B') { w2 = PartialBonus; if(p2) { w2 = FullBonus; }} >>
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| 76 | SEM << score = w0 * s0 + w1 * s1 + w2 * s2; >>
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| 77 | SEM << if (c0=='B' && c1=='B' && c2=='B' && p0 && p1 && p2) { perfect = true; score = CompleteBonus * score; } >>
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| 78 | .
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| 79 |
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| 80 | D<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 81 | double s0, s1, s2, s3;
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| 82 | bool p0, p1, p2, p3;
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| 83 | double w0, w1, w2, w3;
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| 84 | char c0 = ' '; char c1 = ' '; char c2 = ' '; char c3 = ' ' ;
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| 85 | symb = 'D'; perfect = false;
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| 86 | >>
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| 87 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'C') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 88 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'C') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 89 | S<<depth, out s2, out c2, out p2>> SEM << w2 = Penalty; if(c2 == 'C') { w2 = PartialBonus; if(p2) { w2 = FullBonus; }} >>
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| 90 | S<<depth, out s3, out c3, out p3>> SEM << w3 = Penalty; if(c3 == 'C') { w3 = PartialBonus; if(p3) { w3 = FullBonus; }} >>
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| 91 | SEM << score = w0 * s0 + w1 * s1 + w2 * s2 + w3 * s3; >>
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| 92 | SEM << if (c0=='C' && c1=='C' && c2=='C' && c3=='C' && p0 && p1 && p2 && p3) { perfect = true; score = CompleteBonus * score; } >>
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| 93 | .
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| 94 |
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| 95 | E<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 96 | double s0, s1, s2, s3, s4;
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| 97 | bool p0, p1, p2, p3, p4;
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| 98 | double w0, w1, w2, w3, w4;
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| 99 | char c0 = ' '; char c1 = ' '; char c2 = ' '; char c3 = ' '; char c4 = ' ';
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| 100 | symb = 'E'; perfect = false;
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| 101 | >>
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| 102 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'D') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 103 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'D') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 104 | S<<depth, out s2, out c2, out p2>> SEM << w2 = Penalty; if(c2 == 'D') { w2 = PartialBonus; if(p2) { w2 = FullBonus; }} >>
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| 105 | S<<depth, out s3, out c3, out p3>> SEM << w3 = Penalty; if(c3 == 'D') { w3 = PartialBonus; if(p3) { w3 = FullBonus; }} >>
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| 106 | S<<depth, out s4, out c4, out p4>> SEM << w4 = Penalty; if(c4 == 'D') { w4 = PartialBonus; if(p4) { w4 = FullBonus; }} >>
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| 107 | SEM << score = w0 * s0 + w1 * s1 + w2 * s2 + w3 * s3 + w4 * s4; >>
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| 108 | SEM << if (c0=='D' && c1=='D' && c2=='D' && c3=='D' && c4=='D' && p0 && p1 && p2 && p3 && p4) { perfect = true; score = CompleteBonus * score; } >>
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| 109 | .
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| 110 |
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| 111 | F<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 112 | double s0, s1, s2, s3, s4, s5;
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| 113 | bool p0, p1, p2, p3, p4, p5;
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| 114 | double w0, w1, w2, w3, w4, w5;
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| 115 | char c0 = ' '; char c1 = ' '; char c2 = ' '; char c3 = ' '; char c4 = ' '; char c5 = ' ';
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| 116 | symb = 'F'; perfect = false;
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| 117 | >>
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| 118 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'E') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 119 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'E') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 120 | S<<depth, out s2, out c2, out p2>> SEM << w2 = Penalty; if(c2 == 'E') { w2 = PartialBonus; if(p2) { w2 = FullBonus; }} >>
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| 121 | S<<depth, out s3, out c3, out p3>> SEM << w3 = Penalty; if(c3 == 'E') { w3 = PartialBonus; if(p3) { w3 = FullBonus; }} >>
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| 122 | S<<depth, out s4, out c4, out p4>> SEM << w4 = Penalty; if(c4 == 'E') { w4 = PartialBonus; if(p4) { w4 = FullBonus; }} >>
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| 123 | S<<depth, out s5, out c5, out p5>> SEM << w5 = Penalty; if(c5 == 'E') { w5 = PartialBonus; if(p5) { w5 = FullBonus; }} >>
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| 124 | SEM << score = w0 * s0 + w1 * s1 + w2 * s2 + w3 * s3 + w4 * s4 + w5 * s5; >>
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| 125 | SEM << if (c0=='E' && c1=='E' && c2=='E' && c3=='E' && c4=='E' && c5=='E' &&
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| 126 | p0 && p1 && p2 && p3 && p4 && p5) { perfect = true; score = CompleteBonus * score; } >>
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| 127 | .
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| 128 |
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| 129 | G<<int depth, out double score, out char symb, out bool perfect>> = LOCAL << score = 0.0;
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| 130 | double s0, s1, s2, s3, s4, s5, s6;
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| 131 | bool p0, p1, p2, p3, p4, p5, p6;
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| 132 | double w0, w1, w2, w3, w4, w5, w6;
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| 133 | char c0 = ' '; char c1 = ' '; char c2 = ' '; char c3 = ' '; char c4 = ' '; char c5 = ' '; char c6 = ' ';
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| 134 | symb = 'F'; perfect = false;
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| 135 | >>
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| 136 | S<<depth, out s0, out c0, out p0>> SEM << w0 = Penalty; if(c0 == 'F') { w0 = PartialBonus; if(p0) { w0 = FullBonus; }} >>
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| 137 | S<<depth, out s1, out c1, out p1>> SEM << w1 = Penalty; if(c1 == 'F') { w1 = PartialBonus; if(p1) { w1 = FullBonus; }} >>
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| 138 | S<<depth, out s2, out c2, out p2>> SEM << w2 = Penalty; if(c2 == 'F') { w2 = PartialBonus; if(p2) { w2 = FullBonus; }} >>
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| 139 | S<<depth, out s3, out c3, out p3>> SEM << w3 = Penalty; if(c3 == 'F') { w3 = PartialBonus; if(p3) { w3 = FullBonus; }} >>
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| 140 | S<<depth, out s4, out c4, out p4>> SEM << w4 = Penalty; if(c4 == 'F') { w4 = PartialBonus; if(p4) { w4 = FullBonus; }} >>
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| 141 | S<<depth, out s5, out c5, out p5>> SEM << w5 = Penalty; if(c5 == 'F') { w5 = PartialBonus; if(p5) { w5 = FullBonus; }} >>
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| 142 | S<<depth, out s6, out c6, out p6>> SEM << w6 = Penalty; if(c6 == 'F') { w6 = PartialBonus; if(p6) { w6 = FullBonus; }} >>
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| 143 | SEM << score = w0 * s0 + w1 * s1 + w2 * s2 + w3 * s3 + w4 * s4 + w5 * s5 + w6 * s6; >>
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| 144 | SEM << if (c0=='F' && c1=='F' && c2=='F' && c3=='F' && c4=='F' && c5=='F' && c6 == 'F' &&
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| 145 | p0 && p1 && p2 && p3 && p4 && p5 && p6) { perfect = true; score = CompleteBonus * score; } >>
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| 146 | .
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| 147 |
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| 148 | MAXIMIZE
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| 149 | <<
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| 150 | double score;
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| 151 | char symb;
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| 152 | bool perfect;
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| 153 | S(MaxDepth, out score, out symb, out perfect);
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| 154 | return score;
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| 155 | >>
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| 156 | END RoyalTree.
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