December 8th

Lumps of NULL

Santa has been given a data set containing the number of house points achieved by the best students in the country. Obviously these students are not wasting time on screens all week long and therefore use their spare time writing paper based pseudocode solutions to obscure scenario based problems set by popular exam boards. Anyway, Santa is interested in the very best, anyone with 750 house points or more. He is not interested in those strange NULL values which are probably some sort of data input error.

Your data set:

dataset = [721, 483, "NULL", 662, 915, 344, 788, 512, 604, "NULL", 837, 299, 701, "NULL", 456, 882, 640, 778, "NULL", 913, 554, 201, "NULL", 789, 628, 902, "NULL", 475, 367, 811, "NULL", 932, 508, 774, "NULL", 655, 312, "NULL", 899, 721, 467, "NULL", 530, 884, 642, "NULL", 755, 413, 506, "NULL", 960, 688, 742, "NULL", 534, 812, "NULL", 607, 291, 879, "NULL", 703, 518, "NULL", 947, 410, 653, "NULL", 721, 364, "NULL", 800, 537, 728, "NULL", 600, 255, 941, "NULL", 863, 472, "NULL", 664, 705, "NULL", 590, 382, "NULL", 756, 643, 921, "NULL", 514, 879, 331, "NULL", 773, 690, 842, "NULL", 563, 410, "NULL", 997, 618, "NULL", 744, 512, 803, "NULL", 675, 928, "NULL", 761, 410, 889, "NULL", 523, 702, 311, "NULL", 940, 588, 763, "NULL", 471, 354, "NULL", 815, 629, 766, "NULL", 503, 811, 244, "NULL", 676, 492, 734, "NULL", 982, 517, "NULL", 430, 661, "NULL", 547, 866, 309, "NULL", 702, 588, "NULL", 913, 475, "NULL", 765, 820, 402, "NULL", 544, 688, "NULL", 739, 504, "NULL", 813, 297, 655, "NULL", 974, 540, "NULL", 603, 728, "NULL", 415, 890, 667, "NULL", 736, 284, "NULL", 952, 604, "NULL", 771, 560, 449, "NULL", 815, 699, "NULL", 321, 747, "NULL", 622, 390, 845, "NULL", 764, 580, "NULL", 903, 471, "NULL", 517, 842, 290, "NULL", 688, 531, "NULL", 710, 452, "NULL", 803, 618, 357, "NULL", 947, 723, "NULL", 661, 510, "NULL", 884, 430, 799, "NULL", 755, 609, "NULL", 942, 531, "NULL", 770, 493, 322, "NULL", 681, 832, "NULL", 714, 520, "NULL", 976, 604, 713, "NULL", 522, 899, "NULL", 635, 784, "NULL", 410, 953, 620, "NULL", 702, 580, "NULL", 871, 468, "NULL", 713, 342, 915, "NULL", 640, 731, "NULL", 822, 594, "NULL", 417, 983, 702, "NULL", 514, 776, "NULL", 841, 623, "NULL", 710, 455, 912, "NULL", 789, 670, "NULL", 934, 503, "NULL", 604, 832, 419, "NULL", 968, 731, "NULL", 588, 647, "NULL", 820, 479, 301, "NULL", 759, 683, "NULL", 930, 412, "NULL", 577, 854, 690, "NULL", 721, 540, "NULL", 692, 834, "NULL", 500, 745, 980, "NULL", 611, 723, "NULL", 859, 447, "NULL", 712, 501, 968, "NULL", 709, 574, "NULL", 931, 406, "NULL", 854, 723, 510, "NULL", 640, 778, "NULL", 864, 593, "NULL", 701, 380, 905, "NULL", 515, 773, "NULL", 689, 940, "NULL", 462, 870, 752, "NULL", 310, 855, "NULL", 641, 982, "NULL", 791, 544, 703, "NULL", 820, 612, "NULL", 957, 488, "NULL", 740, 393, 864, "NULL", 729, 510, "NULL", 690, 812, "NULL", 577, 904, 618, "NULL", 885, 742, "NULL", 640, 570, "NULL", 910, 811, 265, "NULL", 782, 540, "NULL", 955, 663, "NULL", 781, 497, 612, "NULL", 903, 584, "NULL", 410, 739, "NULL", 812, 501, 967, "NULL", 631, 874, "NULL", 940, 713, "NULL", 652, 890, 777, "NULL", 518, 600, "NULL", 811, 475, "NULL", 943, 691, 320, "NULL", 772, 508, "NULL", 654, 821, "NULL", 735, 406, 958, "NULL", 690, 578, "NULL", 844, 729, "NULL", 620, 915, 500, "NULL", 513, 764, "NULL", 708, 844, "NULL", 937, 652, 774, "NULL", 810, 591, "NULL", 702, 948, "NULL", 469, 835, 641, "NULL", 705, 560, "NULL", 913, 689, "NULL", 724, 458, 871, "NULL", 603, 781, "NULL", 990, 617, "NULL", 741, 588, 409, "NULL", 914, 756, "NULL", 845, 693, "NULL", 703, 521, 980, "NULL"]

Your task:

Iterate through the data and count the number of values that are 750 and over.

Remove from this the number of 'NULL' values in the list and take the absolute value.

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