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Volumn 14, Issue 6, 2010, Pages 942-958

A genetic programming hyper-heuristic approach for evolving 2-D strip packing heuristics

Author keywords

2 D stock cutting; genetic programming; hyper heuristics

Indexed keywords

GENETIC ALGORITHMS; GENETIC PROGRAMMING;

EID: 78649837181     PISSN: 1089778X     EISSN: None     Source Type: Journal    
DOI: 10.1109/TEVC.2010.2041061     Document Type: Article
Times cited : (119)

References (63)
  • 3
    • 33744788405 scopus 로고    scopus 로고
    • A new bottom-left-fill heuristic algorithm for the 2-D irregular packing problem
    • E. K. Burke, R. S. R. Hellier, G. Kendall, and G. Whitwell, "A new bottom-left-fill heuristic algorithm for the 2-D irregular packing problem," Oper. Res., vol. 54, no. 3, pp. 587-601, 2006.
    • (2006) Oper. Res. , vol.54 , Issue.3 , pp. 587-601
    • Burke, E.K.1    Hellier, R.S.R.2    Kendall, G.3    Whitwell, G.4
  • 4
    • 34447100387 scopus 로고    scopus 로고
    • An improved typology of cutting and packing problems
    • G. Wäscher, H. Haußner, and H. Schumann, "An improved typology of cutting and packing problems," Eur. J. Oper. Res., vol. 183, no. 3, pp. 1109-1130, 2007.
    • (2007) Eur. J. Oper. Res. , vol.183 , Issue.3 , pp. 1109-1130
    • Wäscher, G.1    Haußner, H.2    Schumann, H.3
  • 5
    • 0035200786 scopus 로고    scopus 로고
    • An empirical investigation of meta-heuristic and heuristic algorithms for a 2-D packing problem
    • E. Hopper and B. C. H. Turton, "An empirical investigation of meta-heuristic and heuristic algorithms for a 2-D packing problem," Eur. J. Oper. Res., vol. 128, no. 1, pp. 34-57, 2001.
    • (2001) Eur. J. Oper. Res. , vol.128 , Issue.1 , pp. 34-57
    • Hopper, E.1    Turton, B.C.H.2
  • 6
    • 0030571698 scopus 로고    scopus 로고
    • On genetic algorithms for the packing of polygons
    • S. Jakobs, "On genetic algorithms for the packing of polygons," Eur. J. Oper. Res., vol. 88, no. 1, pp. 65-181, 1996.
    • (1996) Eur. J. Oper. Res. , vol.88 , Issue.1 , pp. 65-181
    • Jakobs, S.1
  • 8
    • 0031118203 scopus 로고    scopus 로고
    • No free lunch theorems for optimization
    • Apr
    • D. H. Wolpert and W. G. Macready, "No free lunch theorems for optimization," IEEE Trans. Evol. Comput., vol. 1, no. 1, pp. 67-82, Apr. 1997.
    • (1997) IEEE Trans. Evol. Comput. , vol.1 , Issue.1 , pp. 67-82
    • Wolpert, D.H.1    MacReady, W.G.2
  • 10
    • 0037118761 scopus 로고    scopus 로고
    • Recent research trends in automated timetabling
    • E. K. Burke and S. Petrovic, "Recent research trends in automated timetabling," Eur. J. Oper. Res., vol. 140, no. 2, pp. 266-280, 2002.
    • (2002) Eur. J. Oper. Res. , vol.140 , Issue.2 , pp. 266-280
    • Burke, E.K.1    Petrovic, S.2
  • 11
    • 36148965514 scopus 로고    scopus 로고
    • A survey of metaheuristic-based techniques for University Timetabling problems
    • R. Lewis, "A survey of metaheuristic-based techniques for University Timetabling problems," OR Spectrum, vol. 30, no. 1, pp. 167-190, 2008.
    • (2008) OR Spectrum , vol.30 , Issue.1 , pp. 167-190
    • Lewis, R.1
  • 12
    • 69249232564 scopus 로고    scopus 로고
    • Adaptive tabu search for course timetabling
    • Z. P. Lu and J. K. Hao, "Adaptive tabu search for course timetabling," Eur. J. Oper. Res., vol. 200, no. 1, pp. 235-244, 2010.
    • (2010) Eur. J. Oper. Res. , vol.200 , Issue.1 , pp. 235-244
    • Lu, Z.P.1    Hao, J.K.2
  • 13
    • 60449097879 scopus 로고    scopus 로고
    • A survey of search methodologies and automated system development for examination timetabling
    • R. Qu, E. K. Burke, B. McCollum, L. G. T. Merlot, and S. Y. Lee, "A survey of search methodologies and automated system development for examination timetabling," J. Scheduling, vol. 12, no. 1, pp. 55-89, 2009.
    • (2009) J. Scheduling , vol.12 , Issue.1 , pp. 55-89
    • Qu, R.1    Burke, E.K.2    McCollum, B.3    Merlot, L.G.T.4    Lee, S.Y.5
  • 15
    • 34547212268 scopus 로고    scopus 로고
    • Application of a real-world university-course timetabling model solved by integer programming
    • K. Schimmelpfeng and S. Helber, "Application of a real-world university-course timetabling model solved by integer programming," OR Spectrum, vol. 29, no. 4, pp. 783-803, 2007.
    • (2007) OR Spectrum , vol.29 , Issue.4 , pp. 783-803
    • Schimmelpfeng, K.1    Helber, S.2
  • 16
    • 0036923148 scopus 로고    scopus 로고
    • Automated discovery of composite SAT variable-selection heuristics
    • Menlo Park, CA: American Association for Artificial Intelligence
    • A. S. Fukunaga, "Automated discovery of composite SAT variable-selection heuristics," in Proc. 18th Natl. Conf. Artif. Intell., Menlo Park, CA: American Association for Artificial Intelligence, 2002, pp. 641-648.
    • (2002) Proc. 18th Natl. Conf. Artif. Intell. , pp. 641-648
    • Fukunaga, A.S.1
  • 17
    • 3042708858 scopus 로고    scopus 로고
    • Hyper-heuristics: An emerging direction in modern search technology
    • F. Glover and G. Kochenberger, Eds. Boston, MA: Kluwer
    • E. K. Burke, E. Hart, G. Kendall, J. Newall, P. Ross, and S. Schulenburg, "Hyper-heuristics: An emerging direction in modern search technology," in Handbook of Meta-Heuristics, F. Glover and G. Kochenberger, Eds. Boston, MA: Kluwer, 2003, pp. 457-474.
    • (2003) Handbook of Meta-Heuristics , pp. 457-474
    • Burke, E.K.1    Hart, E.2    Kendall, G.3    Newall, J.4    Ross, P.5    Schulenburg, S.6
  • 21
    • 35248823635 scopus 로고    scopus 로고
    • Learning a procedure that can solve hard bin-packing problems: A new GA-based approach to hyperheuristics
    • Chicago, IL
    • P. Ross, J. G. Marin-Blazquez, S. Schulenburg, and E. Hart, "Learning a procedure that can solve hard bin-packing problems: A new GA-based approach to hyperheuristics," in Proc. Genetic Evol. Comput. Conf. (GECCO), Chicago, IL, 2003, pp. 1295-1306.
    • (2003) Proc. Genetic Evol. Comput. Conf. (GECCO) , pp. 1295-1306
    • Ross, P.1    Marin-Blazquez, J.G.2    Schulenburg, S.3    Hart, E.4
  • 23
    • 11244351342 scopus 로고    scopus 로고
    • Investigation of a tabu assisted hyper-heuristic genetic algorithm
    • Canberra, Australia. Dec
    • L. Han and G. Kendall, "Investigation of a tabu assisted hyper-heuristic genetic algorithm," in Proc. Congr. Evol. Comput. (CEC), vol. 3. Canberra, Australia, Dec. 2003, pp. 2230-2237.
    • (2003) Proc. Congr. Evol. Comput. (CEC) , vol.3 , pp. 2230-2237
    • Han, L.1    Kendall, G.2
  • 24
    • 33646000026 scopus 로고    scopus 로고
    • Case-based heuristic selection for timetabling problems
    • E. K. Burke, S. Petrovic, and R. Qu, "Case-based heuristic selection for timetabling problems," J. Schedul., vol. 9, no. 2, pp. 115-132, 2006.
    • (2006) J. Schedul. , vol.9 , Issue.2 , pp. 115-132
    • Burke, E.K.1    Petrovic, S.2    Qu, R.3
  • 25
    • 33845941176 scopus 로고    scopus 로고
    • A simulated annealing hyper-heuristic for determining shipper sizes
    • K. Dowsland, E. Soubeiga, and E. K. Burke, "A simulated annealing hyper-heuristic for determining shipper sizes," Eur. J. Oper. Res., vol. 179, no. 3, pp. 759-774, 2007.
    • (2007) Eur. J. Oper. Res. , vol.179 , Issue.3 , pp. 759-774
    • Dowsland, K.1    Soubeiga, E.2    Burke, E.K.3
  • 26
    • 1442283467 scopus 로고    scopus 로고
    • A tabu-search hyper-heuristic for timetabling and rostering
    • E. K. Burke, G. Kendall, and E. Soubeiga, "A tabu-search hyper-heuristic for timetabling and rostering," J. Heurist., vol. 9, no. 6, pp. 451-470, 2003.
    • (2003) J. Heurist. , vol.9 , Issue.6 , pp. 451-470
    • Burke, E.K.1    Kendall, G.2    Soubeiga, E.3
  • 27
    • 33748960402 scopus 로고    scopus 로고
    • A graph-based hyper heuristic for timetabling problems
    • Jan
    • E. K. Burke, B. McCollum, A. Meisels, S. Petrovic, and R. Qu, "A graph-based hyper heuristic for timetabling problems," Eur. J. Oper. Res., vol. 176, no. 1, pp. 177-192, Jan. 2007.
    • (2007) Eur. J. Oper. Res. , vol.176 , Issue.1 , pp. 177-192
    • Burke, E.K.1    McCollum, B.2    Meisels, A.3    Petrovic, S.4    Qu, R.5
  • 31
    • 24644438849 scopus 로고    scopus 로고
    • Evolving local search heuristics for SAT using genetic programming
    • LNCS 3103. Seattle, WA: Springer-Verlag
    • A. S. Fukunaga, "Evolving local search heuristics for SAT using genetic programming," in Proc. Assoc. Comput. Machinery Genetic Evol. Com-put. Conf. (GECCO), LNCS 3103. Seattle, WA: Springer-Verlag, 2004, pp. 483-494.
    • (2004) Proc. Assoc. Comput. Machinery Genetic Evol. Com-put. Conf. (GECCO) , pp. 483-494
    • Fukunaga, A.S.1
  • 32
    • 42449117713 scopus 로고    scopus 로고
    • Automated discovery of local search heuristics for satisfiability testing
    • A. Fukunaga, "Automated discovery of local search heuristics for satisfiability testing," in Evol. Comput., vol. 16, no. 1, pp. 31-61, 2008.
    • (2008) Evol. Comput. , vol.16 , Issue.1 , pp. 31-61
    • Fukunaga, A.1
  • 33
    • 44649115391 scopus 로고    scopus 로고
    • Generating SAT local-search heuristics using a GP hyper-heuristic framework
    • LNCS Oct
    • M. B. Bader-El-Din and R. Poli, "Generating SAT local-search heuristics using a GP hyper-heuristic framework," in Proc. 8th Int. Conf. Artif. Evol., LNCS 4926. Oct. 2007, pp. 37-49.
    • (2007) Proc. 8th Int. Conf. Artif. Evol. , vol.4926 , pp. 37-49
    • Bader-El-Din, M.B.1    Poli, R.2
  • 37
    • 55749111191 scopus 로고    scopus 로고
    • Linear genetic programming of parsimonious metaheuristics
    • Singapore, Sep
    • R. E. Keller and R. Poli, "Linear genetic programming of parsimonious metaheuristics," in Proc. IEEE Congr. Evol. Comput. (CEC), Singapore, Sep. 2007, pp. 4508-4515.
    • (2007) Proc IEEE Congr. Evol. Comput. (CEC) , pp. 4508-4515
    • Keller, R.E.1    Poli, R.2
  • 38
    • 30344458483 scopus 로고    scopus 로고
    • Rapid modeling and discovery of priority dispatching rules: An autonomous learning approach
    • C. D. Geiger, R. Uzsoy, and H. Aytug, "Rapid modeling and discovery of priority dispatching rules: An autonomous learning approach," J. Schedul., vol. 9, no. 1, pp. 7-34, 2006.
    • (2006) J. Schedul. , vol.9 , Issue.1 , pp. 7-34
    • Geiger, C.D.1    Uzsoy, R.2    Aytug, H.3
  • 39
    • 0002662534 scopus 로고
    • Multistage cutting stock problems of two and more dimensions
    • P. Gilmore and R. Gomory, "Multistage cutting stock problems of two and more dimensions," Oper. Res., vol. 13, no. 1, pp. 94-120, 1965.
    • (1965) Oper. Res. , vol.13 , Issue.1 , pp. 94-120
    • Gilmore, P.1    Gomory, R.2
  • 40
    • 0002893433 scopus 로고
    • An algorithm for 2-D cutting problems
    • N. Christofides and C. Whitlock, "An algorithm for 2-D cutting problems," Oper. Res., vol. 25, no. 1, pp. 30-44, 1977.
    • (1977) Oper. Res. , vol.25 , Issue.1 , pp. 30-44
    • Christofides, N.1    Whitlock, C.2
  • 41
    • 0021789009 scopus 로고
    • An exact 2-D nonguillotine cutting tree search procedure
    • J. E. Beasley, "An exact 2-D nonguillotine cutting tree search procedure," Oper. Res., vol. 33, no. 1, pp. 49-64, 1985.
    • (1985) Oper. Res. , vol.33 , Issue.1 , pp. 49-64
    • Beasley, J.E.1
  • 42
    • 0030173455 scopus 로고    scopus 로고
    • A recursive exact algorithm for weighted 2-D cutting
    • M. Hifi and V. Zissimopoulos, "A recursive exact algorithm for weighted 2-D cutting," Eur. J. Oper. Res., vol. 91, no. 3, pp. 553-564, 1996.
    • (1996) Eur. J. Oper. Res. , vol.91 , Issue.3 , pp. 553-564
    • Hifi, M.1    Zissimopoulos, V.2
  • 43
    • 0001067988 scopus 로고    scopus 로고
    • Constrained 2-D cutting stock problems: A best-first branch-and-bound algorithm
    • V. D. Cung, M. Hifi, and B. Le Cun, Constrained 2-D cutting stock problems: A best-first branch-and-bound algorithm," Int. Trans. Oper. Res., vol. 7, 3, 185-210, 2000.
    • (2000) Int. Trans. Oper. Res. , vol.7 , Issue.3 , pp. 185-210
    • Cung, V.D.1    Hifi, M.2    Le Cun, B.3
  • 44
    • 34548406878 scopus 로고    scopus 로고
    • A new constraint programming approach for the orthogonal packing problem
    • F. Clautiaux, A. Jouglet, J. Carlier, and A. Moukrim, "A new constraint programming approach for the orthogonal packing problem," Comput. Oper. Res., vol. 35, no. 3, pp. 944-959, 2008.
    • (2008) Comput. Oper. Res. , vol.35 , Issue.3 , pp. 944-959
    • Clautiaux, F.1    Jouglet, A.2    Carlier, J.3    Moukrim, A.4
  • 45
    • 62549136565 scopus 로고    scopus 로고
    • Exact algorithms for the 2-D strip packing problem with and without rotations
    • M. Kenmochi, T. Imamichi, K. Nonobe, M. Yagiura, and H. Nagamochi, "Exact algorithms for the 2-D strip packing problem with and without rotations," Eur. J. Oper. Res., vol. 198, no. 1, pp. 73-83, 2009.
    • (2009) Eur. J. Oper. Res. , vol.198 , Issue.1 , pp. 73-83
    • Kenmochi, M.1    Imamichi, T.2    Nonobe, K.3    Yagiura, M.4    Nagamochi, H.5
  • 46
    • 71749098494 scopus 로고    scopus 로고
    • Arc-flow model for the 2-D guillotine cutting stock problem
    • R. Macedo, C. Alves, and J. M. V. de Carvalho, "Arc-flow model for the 2-D guillotine cutting stock problem," Comput. Oper. Res., vol. 37, no. 6, pp. 991-1001, 2010.
    • (2010) Comput. Oper. Res. , vol.37 , Issue.6 , pp. 991-1001
    • MacEdo, R.1    Alves, C.2    De Carvalho, J.M.V.3
  • 47
    • 59549098139 scopus 로고    scopus 로고
    • A branch and bound algorithm for the strip packing problem
    • R. Alvarez-Valdes, F. Parreno, and J. M. Tamarit, "A branch and bound algorithm for the strip packing problem," OR Spectrum, vol. 31, no. 2, pp. 431-459, 2009.
    • (2009) OR Spectrum , vol.31 , Issue.2 , pp. 431-459
    • Alvarez-Valdes, R.1    Parreno, F.2    Tamarit, J.M.3
  • 49
    • 0020797485 scopus 로고
    • The bottom-left bin packing heuristic: An efficient implementation
    • Aug
    • B. Chazelle, "The bottom-left bin packing heuristic: An efficient implementation," IEEE Trans. Comput., vol. 32, no. 8, pp. 697-707, Aug. 1983.
    • (1983) IEEE Trans. Comput. , vol.32 , Issue.8 , pp. 697-707
    • Chazelle, B.1
  • 50
    • 0020206028 scopus 로고
    • Lower bounds for online 2-D packing algorithms
    • D. J. Brown, B. S. Baker, and H. P. Katseff, "Lower bounds for online 2-D packing algorithms," Acta Inform., vol. 18, no. 2, pp. 207-226, 1982.
    • (1982) Acta Inform. , vol.18 , Issue.2 , pp. 207-226
    • Brown, D.J.1    Baker, B.S.2    Katseff, H.P.3
  • 51
    • 29144523010 scopus 로고    scopus 로고
    • A new heuristic recursive algorithm for the strip rectangular packing problem
    • D. Zhang, Y. Kang, and A. Deng, "A new heuristic recursive algorithm for the strip rectangular packing problem," Comput. Oper. Res., vol. 33, no. 8, pp. 2209-2217, 2006.
    • (2006) Comput. Oper. Res. , vol.33 , Issue.8 , pp. 2209-2217
    • Zhang, D.1    Kang, Y.2    Deng, A.3
  • 52
    • 34447101137 scopus 로고    scopus 로고
    • A 2-D strip cutting problem with sequencing constraint
    • F. Rinaldi and A. Franz, "A 2-D strip cutting problem with sequencing constraint," Eur. J. Oper. Res., vol. 183, no. 3, pp. 1371-1384, 2007.
    • (2007) Eur. J. Oper. Res. , vol.183 , Issue.3 , pp. 1371-1384
    • Rinaldi, F.1    Franz, A.2
  • 53
    • 4544259186 scopus 로고    scopus 로고
    • A new placement heuristic for the orthogonal stock-cutting problem
    • E. K. Burke, G. Kendall, and G. Whitwell, "A new placement heuristic for the orthogonal stock-cutting problem," Oper. Res., vol. 55, no. 4, pp. 655-671, 2004.
    • (2004) Oper. Res. , vol.55 , Issue.4 , pp. 655-671
    • Burke, E.K.1    Kendall, G.2    Whitwell, G.3
  • 54
    • 68749119530 scopus 로고    scopus 로고
    • A simulated annealing enhancement of the best-fit heuristic for the orthogonal stock cutting problem
    • E. K. Burke, G. Kendall, and G. Whitwell, "A simulated annealing enhancement of the best-fit heuristic for the orthogonal stock cutting problem," Inst. Oper. Res. Manage. Sci. J. Comput., vol. 21, no. 3, pp. 505-516, 2009.
    • (2009) St. Oper. Res. Manage. Sci. J. Comput. , vol.21 , Issue.3 , pp. 505-516
    • Burke, E.K.1    Kendall, G.2    Whitwell, G.3
  • 55
    • 0032710465 scopus 로고    scopus 로고
    • An improved BL-algorithm for genetic algorithms of the orthogonal packing of rectangles
    • D. Liu and H. Teng, "An improved BL-algorithm for genetic algorithms of the orthogonal packing of rectangles," Eur. J. Oper. Res., vol. 112, no. 2, pp. 413-419, 1999.
    • (1999) Eur. J. Oper. Res. , vol.112 , Issue.2 , pp. 413-419
    • Liu, D.1    Teng, H.2
  • 56
    • 43149109952 scopus 로고    scopus 로고
    • 1-D heuristics adapted for 2-D rectangular strip packing
    • G. Belov, G. Scheithauer, and E. A. Mukhacheva, "1-D heuristics adapted for 2-D rectangular strip packing," J. Oper. Res. Soc., vol. 59, no. 6, pp. 823-832, 2008.
    • (2008) J. Oper. Res. Soc. , vol.59 , Issue.6 , pp. 823-832
    • Belov, G.1    Scheithauer, G.2    Mukhacheva, E.A.3
  • 57
    • 0033131702 scopus 로고    scopus 로고
    • Effective nesting of rectangular parts in multiple rectangular sheets using genetic and heuristic algorithms
    • A. Ramesh Babu and N. Ramesh Babu, "Effective nesting of rectangular parts in multiple rectangular sheets using genetic and heuristic algorithms," Int. J. Prod. Res., vol. 37, no. 7, pp. 1625-1643, 1999.
    • (1999) Int. J. Prod. Res. , vol.37 , Issue.7 , pp. 1625-1643
    • Ramesh Babu, A.1    Ramesh Babu, N.2
  • 58
    • 0036670463 scopus 로고    scopus 로고
    • VLSI placement and area optimization using a genetic algorithm to breed normalized postfix expressions
    • Aug
    • C. L. Valenzuela and P. Y. Wang, "VLSI placement and area optimization using a genetic algorithm to breed normalized postfix expressions," IEEE Trans. Evol. Comput., vol. 6, no. 4, pp. 390-401, Aug. 2002.
    • (2002) IEEE Trans. Evol. Comput. , vol.6 , Issue.4 , pp. 390-401
    • Valenzuela, C.L.1    Wang, P.Y.2
  • 59
    • 0030811462 scopus 로고    scopus 로고
    • Developing a simulated annealing algorithm for the cutting stock problem
    • K. K. Lai and J. W. M. Chan, "Developing a simulated annealing algorithm for the cutting stock problem," Comput. Ind. Eng., vol. 32, no. 1, pp. 115-127, 1997.
    • (1997) Comput. Ind. Eng. , vol.32 , Issue.1 , pp. 115-127
    • Lai, K.K.1    Chan, J.W.M.2
  • 60
    • 0033132557 scopus 로고    scopus 로고
    • An application of simulated annealing to the cutting stock problem
    • L. Faina, "An application of simulated annealing to the cutting stock problem," Eur. J. Oper. Res., vol. 114, no. 3, pp. 542-556, 1999.
    • (1999) Eur. J. Oper. Res. , vol.114 , Issue.3 , pp. 542-556
    • Faina, L.1
  • 61
    • 33645882933 scopus 로고    scopus 로고
    • A genetic algorithm for the 2-D strip packing problem with rectangular pieces
    • A. Bortfeldt, "A genetic algorithm for the 2-D strip packing problem with rectangular pieces," Eur. J. Oper. Res., vol. 172, no. 3, pp. 814-837, 2006.
    • (2006) Eur. J. Oper. Res. , vol.172 , Issue.3 , pp. 814-837
    • Bortfeldt, A.1
  • 62
    • 34548609506 scopus 로고    scopus 로고
    • Reactive grasp for the strip-packing problem
    • R. Alvarez-Valdes, F. Parreno, and J. M. Tamarit, "Reactive grasp for the strip-packing problem," Comput. Oper. Res., vol. 35, no. 4, pp. 1065-1083, 2008.
    • (2008) Comput. Oper. Res. , vol.35 , Issue.4 , pp. 1065-1083
    • Alvarez-Valdes, R.1    Parreno, F.2    Tamarit, J.M.3
  • 63
    • 3543107181 scopus 로고    scopus 로고
    • A simple but theoretically-motivated method to control bloat in genetic programming
    • (EuroGP) C. Ryan, T. Soule, M. Keijzer, E. Tsang, R. Poli, and E. Costa, Eds. Essex, U.K.: Springer-Verlag, Apr
    • R. Poli, "A simple but theoretically-motivated method to control bloat in genetic programming," in Proc. 6th Eur. Conf. Genetic Program. (EuroGP), C. Ryan, T. Soule, M. Keijzer, E. Tsang, R. Poli, and E. Costa, Eds. Essex, U.K.: Springer-Verlag, Apr. 2003, pp. 211-223.
    • (2003) Proc. 6th Eur. Conf. Genetic Program , pp. 211-223
    • Poli, R.1


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