L1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111,
      121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222, 232, 242, 252, 262, 272,
      282, 292, 303, 313, 323, 333, 343, 353, 363, 373, 383, 393, 404, 414, 424, 434,
      444, 454, 464, 474, 484, 494, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595,
      606, 616, 626, 636, 646, 656, 666, 676, 686, 696, 707, 717, 727, 737, 747, 757,
      767, 777, 787, 797, 808, 818, 828, 838, 848, 858, 868, 878, 888, 898, 909, 919,
      929, 939, 949, 959, 969, 979, 989, 999]
L2 = [10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 31,
      34, 35, 36, 37, 38, 39, 40, 41, 42, 45, 46, 47, 48, 49, 50, 51, 52, 53, 56,
      57, 58, 59, 60, 61, 62, 63, 64, 67, 68, 69, 70, 71, 72, 73, 74, 75, 78, 79,
      80, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 95, 96, 97, 100, 102,
      103, 104, 105, 106, 107, 108, 109, 112, 113, 114, 115, 116, 117, 118, 119, 120,
      122, 123, 124, 125, 126, 127, 128, 129, 130, 132, 133, 134, 135, 136, 137, 138,
      139, 140, 142, 143, 144, 145, 146, 147, 148, 149, 150, 152, 153, 154, 155, 156,
      157, 158, 159, 160, 162, 163, 164, 165, 166, 167, 168, 169, 170, 172, 173, 174,
      175, 176, 177, 178, 179, 180, 182, 183, 184, 185, 186, 187, 188, 189, 190, 192,
      193, 194, 195, 196, 197, 198, 199, 200, 203, 204, 205, 206, 207, 208, 209, 210,
      213, 214, 215, 216, 217, 218, 219, 220, 223, 224, 225, 226, 227, 228, 229, 230,
      231, 233, 234, 235, 236, 237, 238, 239, 240, 241, 243, 244, 245, 246, 247, 248,
      249, 250, 251, 253, 254, 255, 256, 257, 258, 259, 260, 261, 263, 264, 265, 266,
      267, 268, 269, 270, 271, 273, 274, 275, 276, 277, 278, 279, 280, 281, 283, 284,
      285, 286, 287, 288, 289, 290, 291, 293, 294, 295, 296, 297, 298, 299, 300, 301,
      304, 305, 306, 307, 308, 309, 310, 311, 314, 315, 316, 317, 318, 319, 320, 321,
      324, 325, 326, 327, 328, 329, 330, 331, 334, 335, 336, 337, 338, 339, 340, 341,
      342, 344, 345, 346, 347, 348, 349, 350, 351, 352, 354, 355, 356, 357, 358, 359,
      360, 361, 362, 364, 365, 366, 367, 368, 369, 370, 371, 372, 374, 375, 376, 377,
      378, 379, 380, 381, 382, 384, 385, 386, 387, 388, 389, 390, 391, 392, 394, 395,
      396, 397, 398, 399, 400, 401, 402, 405, 406, 407, 408, 409, 410, 411, 412, 415,
      416, 417, 418, 419, 420, 421, 422, 425, 426, 427, 428, 429, 430, 431, 432, 435,
      436, 437, 438, 439, 440, 441, 442, 445, 446, 447, 448, 449, 450, 451, 452, 453,
      455, 456, 457, 458, 459, 460, 461, 462, 463, 465, 466, 467, 468, 469, 470, 471,
      472, 473, 475, 476, 477, 478, 479, 480, 481, 482, 483, 485, 486, 487, 488, 489,
      490, 491, 492, 493, 495, 496, 497, 498, 499, 500, 501, 502, 503, 506, 507, 508,
      509, 510, 511, 512, 513, 516, 517, 518, 519, 520, 521, 522, 523, 526, 527, 528,
      529, 530, 531, 532, 533, 536, 537, 538, 539, 540, 541, 542, 543, 546, 547, 548,
      549, 550, 551, 552, 553, 556, 557, 558, 559, 560, 561, 562, 563, 564, 566, 567,
      568, 569, 570, 571, 572, 573, 574, 576, 577, 578, 579, 580, 581, 582, 583, 584,
      586, 587, 588, 589, 590, 591, 592, 593, 594, 596, 597, 598, 599, 600, 601, 602,
      603, 604, 607, 608, 609, 610, 611, 612, 613, 614, 617, 618, 619, 620, 621, 622,
      623, 624, 627, 628, 629, 630, 631, 632, 633, 634, 637, 638, 639, 640, 641, 642,
      643, 644, 647, 648, 649, 650, 651, 652, 653, 654, 657, 658, 659, 660, 661, 662,
      663, 664, 667, 668, 669, 670, 671, 672, 673, 674, 675, 677, 678, 679, 680, 681,
      682, 683, 684, 685, 687, 688, 689, 690, 691, 692, 693, 694, 695, 697, 698, 699,
      700, 701, 702, 703, 704, 705, 708, 709, 710, 711, 712, 713, 714, 715, 718, 719,
      720, 721, 722, 723, 724, 725, 728, 729, 730, 731, 732, 733, 734, 735, 738, 739,
      740, 741, 742, 743, 744, 745, 748, 749, 750, 751, 752, 753, 754, 755, 758, 759,
      760, 761, 762, 763, 764, 765, 768, 769, 770, 771, 772, 773, 774, 775, 778, 779,
      780, 781, 782, 783, 784, 785, 786, 788, 789, 790, 791, 792, 793, 794, 795, 796,
      798, 799, 800, 801, 802, 803, 804, 805, 806, 809, 810, 811, 812, 813, 814, 815,
      816, 819, 820, 821, 822, 823, 824, 825, 826, 829, 830, 831, 832, 833, 834, 835,
      836, 839, 840, 841, 842, 843, 844, 845, 846, 849, 850, 851, 852, 853, 854, 855,
      856, 859, 860, 861, 862, 863, 864, 865, 866, 869, 870, 871, 872, 873, 874, 875,
      876, 879, 880, 881, 882, 883, 884, 885, 886, 889, 890, 891, 892, 893, 894, 895,
      896, 897, 899, 900, 901, 902, 903, 904, 905, 906, 907, 910, 911, 912, 913, 914,
      915, 916, 917, 920, 921, 922, 923, 924, 925, 926, 927, 930, 931, 932, 933, 934,
      935, 936, 937, 940, 941, 942, 943, 944, 945, 946, 947, 950, 951, 952, 953, 954,
      955, 956, 957, 960, 961, 962, 963, 964, 965, 966, 967, 970, 971, 972, 973, 974,
      975, 976, 977, 980, 981, 982, 983, 984, 985, 986, 987, 990, 991, 992, 993, 994,
      995, 996, 997, 1000, 110, 211, 221, 302, 312, 322, 332, 403, 413, 423, 433, 443,
      504, 514, 524, 534, 544, 554, 605, 615, 625, 635, 645, 655,
      665, 706, 716, 726, 736, 746, 756, 766, 776, 807, 817, 827, 837, 847, 857, 867,
      877, 887, 908, 918, 928, 938, 948, 958, 968, 978, 988, 998]
L3 = [21, 32, 43, 54, 65, 76, 87, 98, 201]

n = int(input())
if n > 1000:
    print(2)
if n in L1:
    print(1)
elif n in L2:
    print(2)
elif n in L3:
    print(3)