c c QCP instance of order 3 in DIMACS format c p cnf 27 57 12 0 0 0 20 0 1 2 3 0 4 5 6 0 7 8 9 0 10 11 12 0 13 14 15 0 16 17 18 0 19 20 21 0 22 23 24 0 25 26 27 0 -1 -4 -7 0 -2 -5 -8 0 -3 -6 -9 0 -10 -13 -16 0 -11 -14 -17 0 -12 -15 -18 0 -19 -22 -25 0 -20 -23 -26 0 -21 -24 -27 0 -1 -10 -19 0 -4 -13 -22 0 -7 -16 -25 0 -2 -11 -20 0 -5 -14 -23 0 -8 -17 -26 0 -3 -12 -21 0 -6 -15 -24 0 -9 -18 -27 0 -1 -2 -3 0 -4 -5 -6 0 -7 -8 -9 0 -10 -11 -12 0 -13 -14 -15 0 -16 -17 -18 0 -19 -20 -21 0 -22 -23 -24 0 -25 -26 -27 0 1 4 7 0 2 5 8 0 3 6 9 0 10 13 16 0 11 14 17 0 12 15 18 0 19 22 25 0 20 23 26 0 21 24 27 0 1 2 3 0 4 5 6 0 7 8 9 0 10 11 12 0 13 14 15 0 16 17 18 0 19 20 21 0 22 23 24 0 25 26 27 0