text: 0,0
  1,1
  2,1
  3,2
  4,3
  5,4
  6,5
  7,6
  8,7
  9,7
  10,8
  11,9
  12,10
  13,11
  14,12
  15,13
  16,13
  17,14
  18,15
  19,16
  20,17
  21,18
  22,19
  23,20
  24,20
  25,21
  26,22
  27,23
  28,24
  29,25
  30,26
  31,27
  32,28
  33,29
  34,29
  35,30
  36,31
  37,32
  38,33
  39,34
  40,35
  41,36
  42,37
  43,38
  44,39
  45,40
  46,40
  47,41
  48,42
  49,43
  50,44
  51,45
  52,46
  53,47
  54,48
  55,49
  56,50
  57,51
  58,52
  59,53
  60,54
  61,55
  62,56
  63,57
  64,57
  65,58
  66,59
  67,60
  68,61
  69,62
  70,63
  71,64
  72,65
  73,66
  74,67
  75,68
  76,69
  77,70
  78,71
  79,72
  80,73
  81,74
  82,75
  83,76
  84,77
  85,78
  86,79
  87,80
  88,81
  89,82
  90,83
  91,84
  92,85
  93,86
  94,87
  95,88
  96,89
  97,90
  98,91
  99,92
  100,93
  101,94
  102,95
  103,96
  104,97
  105,98
  106,99
  107,100
  108,101
  109,102
  110,103
  111,104
  112,105
  113,106
  114,107
  115,108
  116,109
  117,110
  118,111
  119,112
  120,113
  121,114
  122,115
  123,116
  124,117
  125,118
  126,119
  127,120
  128,121
  129,122
  130,122
  131,123
  132,124
  133,125
  134,126
  135,127
  136,128
  137,129
  138,129
  139,130
  140,131
  141,132
  142,133
  143,134
  144,135
  145,136
  146,137
  147,138
  148,139
  149,140
  150,141
  151,142
  152,143
  153,144
  154,145
  155,146
  156,147
  157,148
  158,149
  159,150
  160,151
  161,152
  162,153
  163,154
  164,155
  165,156
  166,157
  167,158
  168,159
  169,160
  170,161
  171,162
  172,163
  173,164
  174,165
  175,166
  176,167
  177,168
  178,169
  179,170
  180,171
  181,172
  182,173
  183,174
  184,175
  185,176
  186,177
  187,178
  188,179
  189,180
  190,181
  191,182
  192,183
  193,184
  194,185
  195,186
  196,187
  197,187
  198,188
  199,189
  200,190
  201,191
  202,192
  203,193
  204,194
  205,195
  206,196
  207,197
  208,198
  209,199
  210,200
  211,201
  212,202
  213,203
  214,204
  215,204
  216,205
  217,206
  218,207
  219,208
  220,209
  221,210
  222,211
  223,212
  224,213
  225,214
  226,215
  227,215
  228,216
  229,217
  230,218
  231,219
  232,220
  233,221
  234,222
  235,223
  236,224
  237,224
  238,225
  239,226
  240,227
  241,228
  242,229
  243,230
  244,231
  245,231
  246,232
  247,233
  248,234
  249,235
  250,236
  251,237
  252,237
  253,238
  254,239
  255,240
  256,241
  257,242
  258,243
  259,243
  260,244
  261,245
  262,246
  263,247
  264,248
  265,248
  266,249
  267,250
  268,251
  269,252
  270,252
  271,253
  272,254
  273,255
  274,256
  275,256
  276,257
  277,258
  278,259
  279,260
  280,260
  281,261
  282,262
  283,263
  284,264
  285,264
  286,265
  287,266
  288,267
  289,267
  290,268
  291,269
  292,270
  293,270
  294,271
  295,272
  296,273
  297,273
  298,274
  299,275
  300,275
  301,276
  302,277
  303,278
  304,278
  305,279
  306,280
  307,280
  308,281
  309,282
  310,283
  311,283
  312,284
  313,285
  314,285
  315,286
  316,287
  317,287
  318,288
  319,289
  320,289
  321,290
  322,291
  323,291
  324,292
  325,293
  326,293
  327,294
  328,294
  329,295
  330,296
  331,296
  332,297
  333,298
  334,298
  335,299
  336,299
  337,300
  338,301
  339,301
  340,302
  341,302
  342,303
  343,304
  344,304
  345,305
  346,305
  347,306
  348,306
  349,307
  350,307
  351,308
  352,309
  353,309
  354,310
  355,310
  356,311
  357,311
  358,312
  359,312
  360,313
  361,313
  362,314
  363,314
  364,315
  365,315
  366,316
  367,316
  368,317
  369,317
  370,318
  371,318
  372,319
  373,319
  374,320
  375,320
  376,320
  377,321
  378,321
  379,322
  380,322
  381,323
  382,323
  383,324
  384,324
  385,324
  386,325
  387,325
  388,326
  389,326
  390,326
  391,327
  392,327
  393,328
  394,328
  395,328
  396,329
  397,329
  398,329
  399,330
  400,330
  401,330
  402,331
  403,331
  404,331
  405,332
  406,332
  407,332
  408,333
  409,333
  410,333
  411,334
  412,334
  413,334
  414,335
  415,335
  416,335
  417,335
  418,336
  419,336
  420,336
  421,337
  422,337
  423,337
  424,337
  425,338
  426,338
  427,338
  428,338
  429,339
  430,339
  431,339
  432,339
  433,339
  434,340
  435,340
  436,340
  437,340
  438,340
  439,341
  440,341
  441,341
  442,341
  443,341
  444,341
  445,342
  446,342
  447,342
  448,342
  449,342
  450,342
  451,342
  452,343
  453,343
  454,343
  455,343
  456,343
  457,343
  458,343
  459,343
  460,343
  461,344
  462,344
  463,344
  464,344
  465,344
  466,344
  467,344
  468,344
  469,344
  470,344
  471,344
  472,344
  473,344
  474,344
  475,344
  476,344
  477,344
  478,344
  479,344
  480,344
  