Notes: = f(best solution)/shortest CPU Time (s), BKS is the best-known solution provided by published papers, —denotes that the data is not available, IACS used Intel Pentium III CPU 1000 MHz with 128 MB RAM, SS_ACO used IBM computer CPU 1600 MHz with 512 MB RAM, and EACO used Pentium IV CPU 3.0 GHz.
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