Jsun Yui Wong
The computer programn listed below is concerned with the scheduling problem of Carlson and Nemhauser (1966). As shown in line 101 through line 215 for a case of scheduling 90 activities among four facilities, the interaction cost between activity 1 and activity 2 (if scheduled on the same facility), the interaction cost between activity 1 and activity 3, the interaction cost between activity 1 and activity 4, ..., and the interaction cost between activity 89 and activity 90 are 1, 4, 1, ..., and 5, respectively. These data were not selected randomly or scientifically.
0 DEFINT A-Z
4 DIM X(90),A(90)
7 DIM TM(90,90),HR(90,90)
21 FOR IW=1 TO 89
23 FOR JW=IW+1 TO 90
26 READ HR(IW,JW)
28 NEXT JW
29 NEXT IW
101 DATA 1,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,1
102 DATA 2,3,1,6,6,3,0,1,2,4,4,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,4,3,4
103 DATA 1,9,3,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,5,6,3,4,2,7,4,2,3,4,3,2
104 DATA 4,3,1,7,7,1,0,4,2,3,7,4,3,0,6,3,2,2,3,2,3,5,0,6,5,3,5,4,2,9,2,7,9,3,7
105 DATA 3,4,5,7,3,5,0,1,2,5,5,2,3,0,6,3,2,2,3,4,0,4,0,2,6,3,5,2,6,8,2,3,4,3,2
106 DATA 9,3,1,7,3,4,0,1,2,5,5,4,3,0,6,3,2,2,8,4,0,1,0,6,2,3,5,2,7,1,2,7,8,3,2
107 DATA 7,4,1,0,3,5,0,1,2,4,5,4,3,0,6,3,2,2,3,4,1,1,0,6,5,5,8,2,7,9,2,7,8,3,6
108 DATA 2,2,3,7,3,5,3,3,2,5,5,4,3,3,6,3,2,2,3,4,0,3,0,2,6,3,5,2,3,8,2,7,8,3,4
109 DATA 5,4,1,6,5,7,0,1,2,5,5,4,3,0,6,3,2,2,3,4,2,1,2,6,6,3,5,2,7,8,2,7,2,3,5
110 DATA 2,4,1,7,3,5,1,1,2,4,2,4,3,0,5,3,2,2,3,4,0,1,2,6,6,4,5,9,7,9,2,7,9,3,2
111 DATA 7,3,4,4,3,5,5,1,2,5,5,4,3,0,6,3,2,2,3,4,5,1,0,6,6,3,5,2,4,4,2,4,4,3,1
112 DATA 2,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,2
113 DATA 3,4,6,7,3,5,1,1,2,5,5,4,3,4,6,3,2,2,3,4,3,3,1,6,6,3,5,2,7,9,2,7,9,3,8
114 DATA 4,4,1,7,4,5,0,1,2,5,5,4,3,1,6,3,2,2,3,4,0,1,1,4,6,4,6,2,7,9,2,7,9,3,1
115 DATA 0,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,2
116 DATA 2,5,1,3,6,2,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,6,2,7,9,3,2
117 DATA 9,3,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,5,4,5,2,7,2,2,4,4,3,7
118 DATA 3,4,1,7,4,5,3,1,2,5,3,4,3,0,6,3,2,2,3,4,5,1,4,6,4,3,5,2,3,4,2,7,4,3,1
119 DATA 6,4,1,7,3,5,0,1,2,5,5,4,3,6,6,3,2,2,3,4,0,1,6,6,6,3,5,2,7,0,2,7,9,3,7
120 DATA 4,2,1,2,7,0,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,3,6,6,3,2,2,3,2,2,4,4,3
121 DATA 3,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,3
122 DATA 3,4,2,7,3,0,0,1,2,4,6,4,3,0,6,3,2,2,3,4,0,2,0,5,6,3,5,2,7,2,2,7,2,3,2
123 DATA 8,4,1,7,3,5,0,1,2,4,7,4,3,0,6,3,2,2,3,4,0,1,0,7,6,3,5,2,7,0,2,7,9,3,8
124 DATA 7,4,1,7,3,5,0,1,2,5,5,4,3,0,7,3,2,2,3,4,0,1,0,4,2,3,5,2,7,8,2,7,0,3,1
125 DATA 9,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,3,2,3,4,0,1,0,6,2,3,5,2,7,9,2,7,0,3,7
126 DATA 3,4,1,7,3,5,0,1,2,5,5,4,3,0,7,3,2,2,3,4,0,1,0,6,6,3,5,2,7,8,2,7,6,3,2
127 DATA 1,3,1,6,3,5,0,1,2,5,6,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,3
128 DATA 7,4,1,7,7,8,0,1,2,5,7,4,3,0,6,3,2,2,3,4,0,1,0,7,6,3,5,2,7,3,2,7,9,3,1
129 DATA 5,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,2,6,3,5,2,7,9,2,7,9,3,3
130 DATA 3,4,2,8,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,3,6,8,3,5,2,7,8,2,8,0,3,4
131 DATA 6,4,1,7,8,9,0,1,2,5,4,4,3,0,6,3,2,2,3,4,0,1,0,3,6,3,5,2,7,9,2,7,8,3,5
132 DATA 3,4,1,7,3,5,0,1,2,1,2,4,3,0,6,3,2,2,3,4,0,1,0,6,4,3,5,2,7,9,2,7,9,3,9
133 DATA 5,4,1,7,3,5,0,1,2,5,5,4,3,1,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,2,3,3
134 DATA 1,4,1,7,5,2,3,1,2,5,5,4,3,1,6,3,2,2,3,4,2,1,0,6,6,3,5,2,7,9,2,7,9,3,1
135 DATA 1,4,1,7,3,5,5,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,6,6,6,3,5,2,2,6,2,7,9,3,1
136 DATA 2,4,1,7,3,5,2,1,2,5,5,4,3,0,6,3,2,2,3,4,3,1,0,6,6,3,5,2,4,9,2,7,6,3,1
137 DATA 7,4,4,5,6,5,0,1,2,5,5,4,3,2,6,3,2,2,3,4,0,1,5,6,7,3,5,2,7,1,2,4,6,3,2
138 DATA 5,4,1,7,3,5,0,5,2,5,5,4,3,0,6,3,2,2,3,4,0,4,0,6,6,3,5,2,7,1,2,7,4,3,2
139 DATA 3,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,3,6,6,3,5,2,7,2,2,7,9,3,2
140 DATA 4,4,1,7,8,5,3,1,2,5,5,4,3,0,5,3,2,2,3,4,0,1,0,6,5,3,5,2,7,9,2,7,2,3,2
141 DATA 2,4,1,7,4,5,0,1,2,5,2,4,3,0,6,3,2,2,3,2,0,1,0,5,6,3,5,2,4,9,2,7,4,3,4
142 DATA 7,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,5,0,1,0,4,6,3,5,2,7,3,2,7,4,3,1
143 DATA 1,4,1,4,3,4,4,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,2
144 DATA 6,4,5,7,3,5,0,1,2,3,5,4,3,3,6,3,2,2,3,4,0,1,0,4,7,3,5,2,7,3,2,7,5,3,3
145 DATA 3,4,1,7,3,5,0,1,2,3,5,4,3,0,6,3,2,2,3,4,3,1,0,6,6,3,5,2,7,3,2,7,4,3,2
146 DATA 5,4,1,7,4,6,0,1,2,5,5,4,3,0,5,3,2,2,3,4,0,1,0,5,6,3,5,2,7,9,2,7,9,3,4
147 DATA 3,4,1,7,3,5,0,1,2,5,3,4,3,0,6,3,2,2,3,4,0,1,0,3,6,3,5,2,7,9,2,7,3,3,1
148 DATA 6,4,1,7,3,5,6,1,2,5,5,4,3,0,6,3,2,2,3,4,6,1,0,5,5,3,3,2,7,3,2,7,9,3,3
149 DATA 7,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,7,6,6,3,5,2,7,7,2,7,2,3,2
150 DATA 1,4,1,7,3,5,2,1,2,5,5,4,3,2,6,3,2,2,3,4,2,1,1,6,6,3,5,2,7,1,2,7,9,3,1
151 DATA 3,4,1,7,3,5,3,1,2,5,5,4,3,0,6,3,2,2,3,4,3,1,0,6,6,3,5,2,7,9,2,7,2,3,2
152 DATA 7,4,1,7,3,5,7,1,2,5,5,4,3,0,6,3,2,2,3,4,7,1,0,6,6,3,5,2,0,0,2,7,9,3,1
153 DATA 0,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,1
154 DATA 0,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,0
155 DATA 3,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,3,1,0,6,6,3,5,2,7,9,2,7,3,3,1
156 DATA 1,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,3
157 DATA 0,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,1,1,3,5,2,7,9,2,7,9,3,2
158 DATA 1,4,1,7,3,5,0,1,2,5,0,4,3,0,6,3,2,2,3,1,0,1,0,6,6,3,5,2,7,9,2,7,9,3,4
159 DATA 0,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,1,2,7,9,3,2
160 DATA 7,4,1,7,3,5,0,1,2,5,5,4,3,0,0,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,7
161 DATA 4,4,1,5,3,5,0,1,2,5,5,4,3,0,5,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,1,3,5
162 DATA 9,4,1,3,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,2,2,7,9,3,8
163 DATA 7,4,1,7,3,5,0,1,2,0,5,4,3,0,0,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,9,3,4
164 DATA 3,4,1,7,3,0,0,1,2,0,5,4,3,0,6,3,2,2,3,4,0,1,0,7,6,3,5,2,7,9,2,7,9,3,6
165 DATA 6,2,5,3,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,2,0,2,6,3,5,2,7,2,2,7,2,3,4
166 DATA 3,4,1,7,3,5,0,1,2,3,5,4,3,0,6,3,3,2,3,4,0,1,0,6,6,3,5,2,7,3,2,7,9,3,7
167 DATA 1,2,1,7,3,5,0,1,2,5,5,4,3,0,5,3,2,2,3,4,0,1,0,4,6,3,5,2,7,9,2,7,4,3,3
168 DATA 3,4,1,7,3,5,0,3,2,5,3,4,3,0,6,3,2,2,3,4,0,2,0,6,6,3,5,2,7,3,2,7,9,3,2
169 DATA 3,4,1,7,3,5,0,1,2,5,0,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,3
170 DATA 5,0,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,0,2,7,9,3,3
171 DATA 5,4,3,7,5,5,2,5,2,5,5,4,3,0,6,3,2,2,3,4,3,4,4,6,3,3,5,2,7,9,2,7,6,3,4
172 DATA 3,4,1,7,3,5,7,1,2,5,5,4,3,3,6,3,2,2,3,4,0,1,0,1,2,3,5,2,7,9,2,7,5,3,3
173 DATA 5,4,1,7,2,4,0,1,2,5,5,4,3,0,2,3,2,2,3,4,0,1,0,6,6,3,5,2,7,5,2,7,9,3,9
174 DATA 3,4,1,0,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,0,6,3,5,2,7,9,2,7,0,3,4
175 DATA 9,4,2,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,2,2,3,3,5,2,7,3,2,7,9,3,7
176 DATA 7,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,0,1,0,2,2,3,5,2,7,3,2,7,9,3,4
177 DATA 4,4,4,7,3,5,0,1,2,2,3,4,3,0,6,3,2,2,3,4,0,5,0,6,1,3,5,2,7,9,2,7,9,3,6
178 DATA 3,4,1,7,3,5,3,1,2,5,5,4,3,0,6,3,2,2,3,4,3,1,0,6,6,3,5,2,7,9,2,7,3,3,2
179 DATA 3,4,3,7,3,5,0,1,2,5,5,4,3,2,6,3,2,2,3,4,2,1,0,6,6,3,3,2,7,1,2,7,9,3,4
180 DATA 2,4,1,7,3,5,6,1,2,5,5,4,3,3,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,0,3,2
181 DATA 3,4,1,7,3,5,0,1,2,5,5,4,3,0,6,3,2,2,3,4,3,1,0,1,2,3,5,2,7,3,2,7,9,3,4
182 DATA 6,5,2,2,3,5,2,1,2,5,5,4,3,0,6,3,2,2,3,4,0,3,3,3,6,3,5,2,7,3,2,7,2,3,5
183 DATA 2,4,1,7,3,2,2,1,2,5,5,4,3,0,4,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,6,3,3
184 DATA 3,4,1,7,3,5,0,1,2,4,5,4,3,0,6,3,2,2,3,4,7,1,0,6,4,3,5,2,7,9,2,7,9,3,3
185 DATA 4,4,1,7,3,5,1,1,2,5,5,4,3,3,6,3,2,2,3,4,0,1,0,6,6,3,5,2,7,9,2,7,3,3,6
186 DATA 2,8,2,7,3,5,1,1,2,5,5,4,3,3,2,3,2,2,3,4,9,1,0,6,6,3,5,8,7,9,2,2,3,3,9
187 DATA 6,4,1,7,4,5,1,1,2,5,4,4,3,3,6,3,2,2,3,4,6,1,0,6,6,3,5,2,7,6,2,7,3,3,4
188 DATA 7,4,1,7,3,5,6,1,2,5,7,4,6,3,6,3,2,2,3,4,0,4,0,6,2,3,5,2,7,9,2,7,4,3,2
189 DATA 2,9,1,4,3,2,1,1,2,5,5,4,3,3,6,3,5,2,3,4,0,1,0,2,6,3,9,2,7,9,2,4,3,3,4
190 DATA 7,4,1,7,3,2,1,1,2,5,3,4,3,3,6,3,7,2,3,4,0,3,0,6,6,3,5,2,7,7,2,7,3,3,3
191 DATA 4,7,1,1,3,5,1,1,2,5,1,4,7,3,6,3,2,2,3,4,0,1,0,1,6,3,5,2,7,1,2,7,3,3,1
192 DATA 5,4,9,7,3,5,1,1,2,9,5,4,5,3,9,3,2,2,3,4,0,1,0,5,6,3,5,2,7,9,2,7,3,3,9
193 DATA 9,9,1,8,3,5,1,1,2,5,8,4,9,3,6,3,2,2,3,4,9,1,0,6,6,8,5,5,7,9,2,7,3,5,8
194 DATA 8,4,1,7,2,5,8,1,2,5,5,4,3,2,6,3,8,2,3,4,0,1,0,6,8,3,5,2,7,9,2,7,3,3,2
195 DATA 2,4,1,7,3,5,1,1,5,2,5,4,3,5,6,3,2,3,5,4,0,1,0,3,6,3,5,2,7,9,2,7,3,5,3
196 DATA 9,6,1,7,3,5,1,7,2,5,5,4,3,7,7,3,2,2,3,9,0,7,6,9,6,3,6,2,7,9,2,7,6,3,9
197 DATA 7,4,1,7,3,5,8,3,2,5,7,4,3,8,6,3,2,2,3,4,0,1,0,6,8,3,5,2,7,9,2,7,7,3,8
198 DATA 6,4,2,7,3,5,1,2,2,5,5,4,6,3,2,3,2,4,3,4,0,1,0,7,6,3,5,2,4,9,2,7,2,3,7
199 DATA 5,7,1,6,3,5,7,1,2,5,5,4,3,3,6,3,7,2,3,4,9,1,9,6,5,3,5,6,7,9,6,6,9,3,5
200 DATA 3,8,1,7,3,5,1,8,2,3,5,4,3,3,6,3,2,2,3,4,0,3,0,6,6,3,5,8,7,9,2,7,3,3,8
201 DATA 6,4,1,7,3,5,1,1,2,5,6,4,3,3,6,3,2,2,3,4,6,1,6,6,6,3,5,2,7,6,2,7,3,6,7
202 DATA 4,7,1,7,3,5,1,7,2,7,5,4,3,3,6,3,7,2,3,4,0,1,0,7,6,3,5,2,6,9,2,7,3,3,3
203 DATA 4,6,1,7,3,5,1,1,2,5,6,4,6,3,6,3,2,6,3,6,6,1,0,6,6,3,6,6,7,9,2,7,6,3,1
204 DATA 6,4,1,7,3,5,1,1,2,6,5,4,3,6,6,3,2,2,6,4,0,2,0,6,6,3,6,2,7,6,3,7,3,6,2
205 DATA 5,5,1,4,4,4,5,4,2,5,5,4,3,3,6,4,2,2,3,4,5,1,0,6,4,5,5,2,7,5,2,7,3,4,5
206 DATA 5,4,1,7,3,5,1,1,2,2,7,7,3,3,2,3,2,7,3,4,0,1,0,7,6,3,5,2,7,9,2,7,7,3,1
207 DATA 4,3,4,7,4,5,1,1,2,3,5,4,4,3,6,3,2,2,4,3,3,1,0,6,6,3,5,2,7,3,2,7,3,4,6
208 DATA 6,5,5,7,3,5,6,1,2,5,5,4,3,3,4,3,2,2,3,4,0,5,0,4,6,3,5,2,7,9,2,7,5,3,4
209 DATA 8,8,1,7,3,5,1,3,4,5,5,4,3,3,6,3,1,2,3,4,1,1,4,8,6,3,5,2,7,8,2,7,3,3,0
210 DATA 9,4,1,6,3,6,1,1,2,5,9,4,3,3,6,9,9,6,3,4,0,1,0,6,6,2,5,2,7,9,2,7,3,2,2
211 DATA 6,4,6,2,3,5,2,1,2,5,5,6,3,3,6,3,2,7,3,4,6,1,0,6,6,3,7,2,7,9,2,7,7,3,7
212 DATA 5,4,5,7,3,5,1,4,5,2,5,4,2,3,2,3,2,2,2,2,0,3,2,6,5,3,5,2,8,9,2,7,7,3,5
213 DATA 0,5,1,7,3,5,5,1,2,5,6,4,3,5,6,3,2,2,3,4,0,1,6,5,6,3,5,2,7,9,2,7,6,3,5
214 DATA 3,4,1,4,2,0,1,1,2,2,0,4,3,3,6,3,2,2,2,4,0,1,0,6,6,2,2,2,7,9,2,7,6,3,0
215 DATA 3,3,1,7,0,5,1,1,2,5,5,0,3,3,5
1065 FOR JJJJ=-32000 TO 32000
1074 RANDOMIZE JJJJ
1076 M=-32000
1085 FOR I=1 TO 90
1088 A(I)=FIX(RND*4)
1089 NEXT I
1126 IMAR=10+FIX(RND*2000)
1128 FOR I=1 TO IMAR
1129 FOR KK=1 TO 90
1131 X(KK)=A(KK)
1132 NEXT KK
1223 IJL=1+FIX(RND*90)
1234 X(IJL)=FIX(RND*4)
1533 FOR IX=1 TO 89
1534 FOR JX=IX+1 TO 90
1542 IF X(IX)=X(JX) THEN TM(IX,JX)=HR(IX,JX) ELSE TM(IX,JX)=0
1545 NEXT JX
1547 NEXT IX
1611 SUMTL=0
1612 FOR IR1=1 TO 89
1614 FOR IR2=IR1+1 TO 90
1616 SUMTL=SUMTL+TM(IR1,IR2)
1617 NEXT IR2
1619 NEXT IR1
1645 P=-SUMTL
1656 IF P<=M THEN 1670
1657 FOR KEW=1 TO 90
1658 A(KEW)=X(KEW)
1659 NEXT KEW
1661 M=P
1666 GOTO 1128
1670 NEXT I
1890 IF M>-2400 THEN 1912 ELSE 1999
1912 PRINT A(1),A(2),A(3),A(4),A(5)
1913 PRINT A(6),A(7),A(8),A(9),A(10)
1914 PRINT A(11),A(12),A(13),A(14),A(15)
1915 PRINT A(16),A(17),A(18),A(19),A(20)
1916 PRINT A(21),A(22),A(23),A(24),A(25)
1917 PRINT A(26),A(27),A(28),A(29),A(30)
1918 PRINT A(31),A(32),A(33),A(34),A(35)
1919 PRINT A(36),A(37),A(38),A(39),A(40)
1920 PRINT A(41),A(42),A(43),A(44),A(45)
1921 PRINT A(46),A(47),A(48),A(49),A(50)
1922 PRINT A(51),A(52),A(53),A(54),A(55)
1923 PRINT A(56),A(57),A(58),A(59),A(60)
1924 PRINT A(61),A(62),A(63),A(64),A(65)
1925 PRINT A(66),A(67),A(68),A(69),A(70)
1926 PRINT A(71),A(72),A(73),A(74),A(75)
1927 PRINT A(76),A(77),A(78),A(79),A(80)
1928 PRINT A(81),A(82),A(83),A(84),A(85)
1929 PRINT A(86),A(87),A(88),A(89),A(90)
1937 PRINT M,JJJJ
1999 NEXT JJJJ
This BASIC computer program was run with Microsoft's GW BASIC 3.11 interpreter, and the best candidate solutions through JJJJ=-31765 are presented below. Only the candidate solution at JJJJ=-31948 is presented in full; each of the other candidate solutions below is briefly presented with its line 1937.
0 1 0 2 3
3 1 0 1 0
2 3 3 2 0
2 0 2 3 3
2 0 2 0 2
3 3 2 0 1
0 1 3 2 1
0 2 0 1 3
3 2 0 1 0
0 3 3 2 0
2 0 0 3 2
2 0 2 0 2
3 2 2 0 1
1 1 3 2 1
1 1 1 1 3
1 1 0 1 3
1 3 3 3 0
1 3 0 3 2
-2357 -31948
-2357 -31898
-2357 -31887
-2357 -31883
-2357 -31840
-2357 -31797
-2357 -31786
-2357 -31765
Interpreted in accordance with line 1912 through line 1937, these candidate solutions were produced in 5.5 hours of running on a personal computer with an Intel 2.66 GHz. chip and the IBM basica/D interpreter, which is not a compiler.
Reference
Carlson, R. C., and G. L. Nemhauser, "Scheduling to Minimize Interaction Cost," Operations Research 14, 52-58 (1966).
