num_to_classes = {
 0: 'acc-phys',
 1: 'adap-org',
 2: 'alg-geom',
 3: 'ao-sci',
 4: 'astro-ph',
 5: 'astro-ph.CO',
 6: 'astro-ph.EP',
 7: 'astro-ph.GA',
 8: 'astro-ph.HE',
 9: 'astro-ph.IM',
 10: 'astro-ph.SR',
 11: 'atom-ph',
 12: 'bayes-an',
 13: 'chao-dyn',
 14: 'chem-ph',
 15: 'cmp-lg',
 16: 'comp-gas',
 17: 'cond-mat',
 18: 'cond-mat.dis-nn',
 19: 'cond-mat.mes-hall',
 20: 'cond-mat.mtrl-sci',
 21: 'cond-mat.other',
 22: 'cond-mat.quant-gas',
 23: 'cond-mat.soft',
 24: 'cond-mat.stat-mech',
 25: 'cond-mat.str-el',
 26: 'cond-mat.supr-con',
 27: 'cs.AI',
 28: 'cs.AR',
 29: 'cs.CC',
 30: 'cs.CE',
 31: 'cs.CG',
 32: 'cs.CL',
 33: 'cs.CR',
 34: 'cs.CV',
 35: 'cs.CY',
 36: 'cs.DB',
 37: 'cs.DC',
 38: 'cs.DL',
 39: 'cs.DM',
 40: 'cs.DS',
 41: 'cs.ET',
 42: 'cs.FL',
 43: 'cs.GL',
 44: 'cs.GR',
 45: 'cs.GT',
 46: 'cs.HC',
 47: 'cs.IR',
 48: 'cs.IT',
 49: 'cs.LG',
 50: 'cs.LO',
 51: 'cs.MA',
 52: 'cs.MM',
 53: 'cs.MS',
 54: 'cs.NA',
 55: 'cs.NE',
 56: 'cs.NI',
 57: 'cs.OH',
 58: 'cs.OS',
 59: 'cs.PF',
 60: 'cs.PL',
 61: 'cs.RO',
 62: 'cs.SC',
 63: 'cs.SD',
 64: 'cs.SE',
 65: 'cs.SI',
 66: 'cs.SY',
 67: 'dg-ga',
 68: 'econ.EM',
 69: 'econ.GN',
 70: 'econ.TH',
 71: 'eess.AS',
 72: 'eess.IV',
 73: 'eess.SP',
 74: 'eess.SY',
 75: 'funct-an',
 76: 'gr-qc',
 77: 'hep-ex',
 78: 'hep-lat',
 79: 'hep-ph',
 80: 'hep-th',
 81: 'math-ph',
 82: 'math.AC',
 83: 'math.AG',
 84: 'math.AP',
 85: 'math.AT',
 86: 'math.CA',
 87: 'math.CO',
 88: 'math.CT',
 89: 'math.CV',
 90: 'math.DG',
 91: 'math.DS',
 92: 'math.FA',
 93: 'math.GM',
 94: 'math.GN',
 95: 'math.GR',
 96: 'math.GT',
 97: 'math.HO',
 98: 'math.KT',
 99: 'math.LO',
 100: 'math.MG',
 101: 'math.NA',
 102: 'math.NT',
 103: 'math.OA',
 104: 'math.OC',
 105: 'math.PR',
 106: 'math.QA',
 107: 'math.RA',
 108: 'math.RT',
 109: 'math.SG',
 110: 'math.SP',
 111: 'math.ST',
 112: 'mtrl-th',
 113: 'nlin.AO',
 114: 'nlin.CD',
 115: 'nlin.CG',
 116: 'nlin.PS',
 117: 'nlin.SI',
 118: 'nucl-ex',
 119: 'nucl-th',
 120: 'patt-sol',
 121: 'physics.acc-ph',
 122: 'physics.ao-ph',
 123: 'physics.app-ph',
 124: 'physics.atm-clus',
 125: 'physics.atom-ph',
 126: 'physics.bio-ph',
 127: 'physics.chem-ph',
 128: 'physics.class-ph',
 129: 'physics.comp-ph',
 130: 'physics.data-an',
 131: 'physics.ed-ph',
 132: 'physics.flu-dyn',
 133: 'physics.gen-ph',
 134: 'physics.geo-ph',
 135: 'physics.hist-ph',
 136: 'physics.ins-det',
 137: 'physics.med-ph',
 138: 'physics.optics',
 139: 'physics.plasm-ph',
 140: 'physics.pop-ph',
 141: 'physics.soc-ph',
 142: 'physics.space-ph',
 143: 'plasm-ph',
 144: 'q-alg',
 145: 'q-bio.BM',
 146: 'q-bio.CB',
 147: 'q-bio.GN',
 148: 'q-bio.MN',
 149: 'q-bio.NC',
 150: 'q-bio.OT',
 151: 'q-bio.PE',
 152: 'q-bio.QM',
 153: 'q-bio.SC',
 154: 'q-bio.TO',
 155: 'q-fin.CP',
 156: 'q-fin.EC',
 157: 'q-fin.GN',
 158: 'q-fin.MF',
 159: 'q-fin.PM',
 160: 'q-fin.PR',
 161: 'q-fin.RM',
 162: 'q-fin.ST',
 163: 'q-fin.TR',
 164: 'quant-ph',
 165: 'solv-int',
 166: 'stat.AP',
 167: 'stat.CO',
 168: 'stat.ME',
 169: 'stat.ML',
 170: 'stat.OT',
 171: 'supr-con'}

classes_to_num = {
 'acc-phys': 0,
 'adap-org': 1,
 'alg-geom': 2,
 'ao-sci': 3,
 'astro-ph': 4,
 'astro-ph.CO': 5,
 'astro-ph.EP': 6,
 'astro-ph.GA': 7,
 'astro-ph.HE': 8,
 'astro-ph.IM': 9,
 'astro-ph.SR': 10,
 'atom-ph': 11,
 'bayes-an': 12,
 'chao-dyn': 13,
 'chem-ph': 14,
 'cmp-lg': 15,
 'comp-gas': 16,
 'cond-mat': 17,
 'cond-mat.dis-nn': 18,
 'cond-mat.mes-hall': 19,
 'cond-mat.mtrl-sci': 20,
 'cond-mat.other': 21,
 'cond-mat.quant-gas': 22,
 'cond-mat.soft': 23,
 'cond-mat.stat-mech': 24,
 'cond-mat.str-el': 25,
 'cond-mat.supr-con': 26,
 'cs.AI': 27,
 'cs.AR': 28,
 'cs.CC': 29,
 'cs.CE': 30,
 'cs.CG': 31,
 'cs.CL': 32,
 'cs.CR': 33,
 'cs.CV': 34,
 'cs.CY': 35,
 'cs.DB': 36,
 'cs.DC': 37,
 'cs.DL': 38,
 'cs.DM': 39,
 'cs.DS': 40,
 'cs.ET': 41,
 'cs.FL': 42,
 'cs.GL': 43,
 'cs.GR': 44,
 'cs.GT': 45,
 'cs.HC': 46,
 'cs.IR': 47,
 'cs.IT': 48,
 'cs.LG': 49,
 'cs.LO': 50,
 'cs.MA': 51,
 'cs.MM': 52,
 'cs.MS': 53,
 'cs.NA': 54,
 'cs.NE': 55,
 'cs.NI': 56,
 'cs.OH': 57,
 'cs.OS': 58,
 'cs.PF': 59,
 'cs.PL': 60,
 'cs.RO': 61,
 'cs.SC': 62,
 'cs.SD': 63,
 'cs.SE': 64,
 'cs.SI': 65,
 'cs.SY': 66,
 'dg-ga': 67,
 'econ.EM': 68,
 'econ.GN': 69,
 'econ.TH': 70,
 'eess.AS': 71,
 'eess.IV': 72,
 'eess.SP': 73,
 'eess.SY': 74,
 'funct-an': 75,
 'gr-qc': 76,
 'hep-ex': 77,
 'hep-lat': 78,
 'hep-ph': 79,
 'hep-th': 80,
 'math-ph': 81,
 'math.AC': 82,
 'math.AG': 83,
 'math.AP': 84,
 'math.AT': 85,
 'math.CA': 86,
 'math.CO': 87,
 'math.CT': 88,
 'math.CV': 89,
 'math.DG': 90,
 'math.DS': 91,
 'math.FA': 92,
 'math.GM': 93,
 'math.GN': 94,
 'math.GR': 95,
 'math.GT': 96,
 'math.HO': 97,
 'math.KT': 98,
 'math.LO': 99,
 'math.MG': 100,
 'math.NA': 101,
 'math.NT': 102,
 'math.OA': 103,
 'math.OC': 104,
 'math.PR': 105,
 'math.QA': 106,
 'math.RA': 107,
 'math.RT': 108,
 'math.SG': 109,
 'math.SP': 110,
 'math.ST': 111,
 'mtrl-th': 112,
 'nlin.AO': 113,
 'nlin.CD': 114,
 'nlin.CG': 115,
 'nlin.PS': 116,
 'nlin.SI': 117,
 'nucl-ex': 118,
 'nucl-th': 119,
 'patt-sol': 120,
 'physics.acc-ph': 121,
 'physics.ao-ph': 122,
 'physics.app-ph': 123,
 'physics.atm-clus': 124,
 'physics.atom-ph': 125,
 'physics.bio-ph': 126,
 'physics.chem-ph': 127,
 'physics.class-ph': 128,
 'physics.comp-ph': 129,
 'physics.data-an': 130,
 'physics.ed-ph': 131,
 'physics.flu-dyn': 132,
 'physics.gen-ph': 133,
 'physics.geo-ph': 134,
 'physics.hist-ph': 135,
 'physics.ins-det': 136,
 'physics.med-ph': 137,
 'physics.optics': 138,
 'physics.plasm-ph': 139,
 'physics.pop-ph': 140,
 'physics.soc-ph': 141,
 'physics.space-ph': 142,
 'plasm-ph': 143,
 'q-alg': 144,
 'q-bio.BM': 145,
 'q-bio.CB': 146,
 'q-bio.GN': 147,
 'q-bio.MN': 148,
 'q-bio.NC': 149,
 'q-bio.OT': 150,
 'q-bio.PE': 151,
 'q-bio.QM': 152,
 'q-bio.SC': 153,
 'q-bio.TO': 154,
 'q-fin.CP': 155,
 'q-fin.EC': 156,
 'q-fin.GN': 157,
 'q-fin.MF': 158,
 'q-fin.PM': 159,
 'q-fin.PR': 160,
 'q-fin.RM': 161,
 'q-fin.ST': 162,
 'q-fin.TR': 163,
 'quant-ph': 164,
 'solv-int': 165,
 'stat.AP': 166,
 'stat.CO': 167,
 'stat.ME': 168,
 'stat.ML': 169,
 'stat.OT': 170,
 'supr-con': 171
}