# Help me figure out this algorithm

1. Nov 3, 2008

### falco2942

I read the rules of the site and read the stickies, I hope this is in the right section.

I need help figuring out this algorithm, putting a number in generates the corresponding numbers. Sorry if the post is long, I tried to get as much information as possible.

I can enter any number that you want to try and figure it out.

Thanks for any help in advance.

Number that is put in.

6547

Numbers that are generated:

19085
19068
19090
19075
19074
19073
19072
19078
19077
19076
19083
19082
19081
19087
19079
19080
20351
20345
20344
20349
20348
20355
20354
20353
20352
20359
20361
20362
20360
20356
20363
20367
20366
20365
20364
20371
20370
20369
20368
20375
20374
20373
20379
20378
20377
20383
20381
20380
20357
20382
20346
20372
20350
20358
20376
19524
19534
19529
19528
19533
19532
19538
19537
19536
19543
19541
19553
19535
19544
19549
19520
19522
19551
19546
19526
19531
19530
19542
19555
19554
19545
19552
19539
19550
19540
19557
19556
19527
19525
19558
19548
19521
19547
20456
20462
20460
20461
20476
20459
20463
20465
20457
20464
20453
20467
20469
20468
20475
20466
20471
20451
20458
20470
20450
20472
20479
20473
20445
20474
20455
20449
20452
20478
20477
20454
19457
19456
20446
19458
20444
20448

Number that is put in.

1138

Numbers that are generated:

22380
22429
22387
22370
22371
22368
22369
22375
22372
22373
22378
22379
22376
22382
22374
22377
21150
21144
21145
21148
21149
21090
21091
21088
21089
21094
21096
21099
21097
21093
21098
21102
21103
21100
21101
21106
21107
21104
21105
21110
21111
21108
21114
21115
21112
21118
21116
21117
21092
21119
21147
21109
21151
21095
21113
20901
20911
20904
20905
20908
20909
20915
20912
20913
20918
20916
20864
20910
20921
20924
20897
20899
20926
20923
20903
20906
20907
20919
20866
20867
20920
20865
20914
20927
20917
20868
20869
20902
20900
20871
20925
20896
20922
21001
21007
21005
21004
21021
21002
21006
21008
21000
21009
20996
21010
21012
21013
21018
21011
21014
20994
21003
21015
20995
21017
21022
21016
21052
21019
20998
20992
20997
21023
21020
20999
20960
20961
21055
20963
21053
20993

2. Nov 3, 2008

### dodo

See if the attached C program reproduces the same output. (Rename the .txt to an extension of .c , and compile on your own - I don't have a Windows machine at hand right now.)

As a check, verify if the output, when given the number 1234, is:
22476
22333
22483
22466
22467
22464
22465
22471
22468
22469
22474
22475
22472
22478
22470
22473
21054
21048
21049
21052
21053
21186
21187
21184
21185
21190
21192
21195
21193
21189
21194
21198
21199
21196
21197
21202
21203
21200
21201
21206
21207
21204
21210
21211
21208
21214
21212
21213
21188
21215
21051
21205
21055
21191
21209
20741
20751
20744
20745
20748
20749
20755
20752
20753
20758
20756
20768
20750
20761
20764
20737
20739
20766
20763
20743
20746
20747
20759
20770
20771
20760
20769
20754
20767
20757
20772
20773
20742
20740
20775
20765
20736
20762
21161
21167
21165
21164
21181
21162
21166
21168
21160
21169
21156
21170
21172
21173
21178
21171
21174
21154
21163
21175
21155
21177
21182
21176
21148
21179
21158
21152
21157
21183
21180
21159
20800
20801
21151
20803
21149
21153

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3. Nov 3, 2008

### falco2942

Algorithm has been found by one of my friends, thread can be locked or left to die.

Last edited: Nov 4, 2008