case 1 failed: expected 0.0000000000 got 11.3510399100 input: 7 1 -7.47 -9.35 8.63 -0.98 6.65 0.30 -9.04 -3.94 6.65 3.85 4.77 6.09 -5.07 -0.77 -8.12 -8.44 0.20 1.83