c FILE:  par8-4-c.cnf
c
c SOURCE: James Crawford (jc@research.att.com)
c
c DESCRIPTION: Instance arises from the problem of learning the parity
c              function.  
c
c     parxx-y denotes a parity problem on xx bits.  y is simply the
c     intance number.
c
c     parxx-y-c denotes an instance identical to parxx-y except that
c     the instances have been simplified (to create an equivalent
c     problem). 
c
c NOTE: Satisfiable (checked for 8 and 16 size instances. All
c       instances are satisfiable by construction)
c
c NOTE: Number of clauses corrected August 3, 1993
c
c Converted from tableau format Tue Aug  3 09:55:40 EDT 1993
p cnf 67 266
 -2 1
 0
 -3 -2
 0
 -3 -2 -1
 0
 3 2 -1
 0
 -3 2 1
 0
 3 -2 1
 0
 -4 2
 0
 -5 -4
 0
 -5 -4 -2
 0
 5 4 -2
 0
 -5 4 2
 0
 5 -4 2
 0
 -6 4
 0
 -7 -6
 0
 -7 -6 -4
 0
 7 6 -4
 0
 -7 6 4
 0
 7 -6 4
 0
 -8 6
 0
 -9 -8
 0
 -9 -8 -6
 0
 9 8 -6
 0
 -9 8 6
 0
 9 -8 6
 0
 -10 8
 0
 -11 -10
 0
 -11 -10 -8
 0
 11 10 -8
 0
 -11 10 8
 0
 11 -10 8
 0
 -12 10
 0
 -13 -12
 0
 -13 -12 -10
 0
 13 12 -10
 0
 -13 12 10
 0
 13 -12 10
 0
 -14 12
 0
 -15 -14
 0
 -15 -14 -12
 0
 15 14 -12
 0
 -15 14 12
 0
 15 -14 12
 0
 -16 14
 0
 -17 -16
 0
 -17 -16 -14
 0
 17 16 -14
 0
 -17 16 14
 0
 17 -16 14
 0
 -18 16
 0
 -19 -18
 0
 -19 -18 -16
 0
 19 18 -16
 0
 -19 18 16
 0
 19 -18 16
 0
 -20 18
 0
 -21 -20
 0
 -21 -20 -18
 0
 21 20 -18
 0
 -21 20 18
 0
 21 -20 18
 0
 -22 20
 0
 -23 -22
 0
 -23 -22 -20
 0
 23 22 -20
 0
 -23 22 20
 0
 23 -22 20
 0
 -24 22
 0
 -25 -24
 0
 -25 -24 -22
 0
 25 24 -22
 0
 -25 24 22
 0
 25 -24 22
 0
 -26 24
 0
 -27 -26
 0
 -27 -26 -24
 0
 27 26 -24
 0
 -27 26 24
 0
 27 -26 24
 0
 -28 26
 0
 -29 -28
 0
 -29 -28 -26
 0
 29 28 -26
 0
 -29 28 26
 0
 29 -28 26
 0
 28 -30
 0
 -31 -30
 0
 -31 -28 -30
 0
 31 -28 30
 0
 -31 28 30
 0
 31 28 -30
 0
 -33 -32 -3
 0
 33 32 -3
 0
 -33 32 3
 0
 33 -32 3
 0
 -35 -34 -32
 0
 35 34 -32
 0
 -35 34 32
 0
 35 -34 32
 0
 -37 -36 -34
 0
 37 36 -34
 0
 -37 36 34
 0
 37 -36 34
 0
 -35 -38 -5
 0
 35 38 -5
 0
 -35 38 5
 0
 35 -38 5
 0
 -40 -39 -38
 0
 40 39 -38
 0
 -40 39 38
 0
 40 -39 38
 0
 -35 -41 -7
 0
 35 41 -7
 0
 -35 41 7
 0
 35 -41 7
 0
 -37 -42 -41
 0
 37 42 -41
 0
 -37 42 41
 0
 37 -42 41
 0
 -33 -42 -9
 0
 33 42 -9
 0
 -33 42 9
 0
 33 -42 9
 0
 -43 -11 42
 0
 43 -11 -42
 0
 -43 11 -42
 0
 43 11 42
 0
 -33 -44 -13
 0
 33 44 -13
 0
 -33 44 13
 0
 33 -44 13
 0
 -35 -45 -44
 0
 35 45 -44
 0
 -35 45 44
 0
 35 -45 44
 0
 -43 -46 -45
 0
 43 46 -45
 0
 -43 46 45
 0
 43 -46 45
 0
 -39 -36 -46
 0
 39 36 -46
 0
 -39 36 46
 0
 39 -36 46
 0
 -33 -47 -15
 0
 33 47 -15
 0
 -33 47 15
 0
 33 -47 15
 0
 -43 -42 -47
 0
 43 42 -47
 0
 -43 42 47
 0
 43 -42 47
 0
 -33 -48 -17
 0
 33 48 -17
 0
 -33 48 17
 0
 33 -48 17
 0
 -35 -49 -48
 0
 35 49 -48
 0
 -35 49 48
 0
 35 -49 48
 0
 -43 -50 -49
 0
 43 50 -49
 0
 -43 50 49
 0
 43 -50 49
 0
 -40 -51 -50
 0
 40 51 -50
 0
 -40 51 50
 0
 40 -51 50
 0
 -39 -51 36
 0
 39 -51 -36
 0
 -39 51 -36
 0
 39 51 36
 0
 -43 -52 -19
 0
 43 52 -19
 0
 -43 52 19
 0
 43 -52 19
 0
 -40 -52 39
 0
 40 -52 -39
 0
 -40 52 -39
 0
 40 52 39
 0
 -35 -53 -21
 0
 35 53 -21
 0
 -35 53 21
 0
 35 -53 21
 0
 -43 -54 -53
 0
 43 54 -53
 0
 -43 54 53
 0
 43 -54 53
 0
 -40 -55 -54
 0
 40 55 -54
 0
 -40 55 54
 0
 40 -55 54
 0
 -42 -55 36
 0
 42 -55 -36
 0
 -42 55 -36
 0
 42 55 36
 0
 -35 -56 -23
 0
 35 56 -23
 0
 -35 56 23
 0
 35 -56 23
 0
 -43 -56 -42
 0
 43 -56 42
 0
 -43 56 42
 0
 43 56 -42
 0
 -35 -57 -25
 0
 35 57 -25
 0
 -35 57 25
 0
 35 -57 25
 0
 -43 -58 -57
 0
 43 58 -57
 0
 -43 58 57
 0
 43 -58 57
 0
 -37 -42 -58
 0
 37 42 -58
 0
 -37 42 58
 0
 37 -42 58
 0
 -33 -59 -27
 0
 33 59 -27
 0
 -33 59 27
 0
 33 -59 27
 0
 -39 -59 42
 0
 39 -59 -42
 0
 -39 59 -42
 0
 39 59 42
 0
 -43 -60 -29
 0
 43 60 -29
 0
 -43 60 29
 0
 43 -60 29
 0
 -40 -60 36
 0
 40 -60 -36
 0
 -40 60 -36
 0
 40 60 36
 0
 -33 -61 -31
 0
 33 61 -31
 0
 -33 61 31
 0
 33 -61 31
 0
 -43 -62 -61
 0
 43 62 -61
 0
 -43 62 61
 0
 43 -62 61
 0
 -39 -63 -62
 0
 39 63 -62
 0
 -39 63 62
 0
 39 -63 62
 0
 -37 -64 -63
 0
 37 64 -63
 0
 -37 64 63
 0
 37 -64 63
 0
 -42 -64 -36
 0
 42 -64 36
 0
 -42 64 36
 0
 42 64 -36
 0
 -33 -65 -30
 0
 33 65 -30
 0
 -33 65 30
 0
 33 -65 30
 0
 -35 -66 -65
 0
 35 66 -65
 0
 -35 66 65
 0
 35 -66 65
 0
 -43 -67 -66
 0
 43 67 -66
 0
 -43 67 66
 0
 43 -67 66
 0
 -39 -37 -67
 0
 39 37 -67
 0
 -39 37 67
 0
 39 -37 67
 0