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Solution 275427

Submitted on 8 Jul 2013 by Dan

Correct

54Size
Leading solution size is 15.
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test Suite

Test
Code Input and Output
1
Pass
 
%%
a = 0;
z_correct = 1;
assert(isequal(lastzerorow(a),z_correct))
ans =
     1
2
Pass
 
%%
a = 1;
z_correct = 0;
assert(isequal(lastzerorow(a),z_correct))
ans =
     0
3
Pass
 
%%
a = randi(1000,1000,1);
z_correct = 0;
assert(isequal(lastzerorow(a),z_correct))
ans =
     0
4
Pass
 
%%
a = [0;1;0;2;0;3;0;4;0;5;0;6;0;7;0;8;0;9;0;10];
z_correct = 19;
assert(isequal(lastzerorow(a),z_correct))
ans =
    19
5
Pass
 
%%
n = randi(1000);
a = tril(ones(n));
z_correct = 0:n-1;
assert(isequal(lastzerorow(a),z_correct))
ans =
  Columns 1 through 16
     0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15
  Columns 17 through 32
    16    17    18    19    20    21    22    23    24    25    26    27    28    29    30    31
  Columns 33 through 48
    32    33    34    35    36    37    38    39    40    41    42    43    44    45    46    47
  Columns 49 through 64
    48    49    50    51    52    53    54    55    56    57    58    59    60    61    62    63
  Columns 65 through 80
    64    65    66    67    68    69    70    71    72    73    74    75    76    77    78    79
  Columns 81 through 96
    80    81    82    83    84    85    86    87    88    89    90    91    92    93    94    95
  Columns 97 through 112
    96    97    98    99   100   101   102   103   104   105   106   107   108   109   110   111
  Columns 113 through 128
   112   113   114   115   116   117   118   119   120   121   122   123   124   125   126   127
  Columns 129 through 144
   128   129   130   131   132   133   134   135   136   137   138   139   140   141   142   143
  Columns 145 through 160
   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159
  Columns 161 through 176
   160   161   162   163   164   165   166   167   168   169   170   171   172   173   174   175
  Columns 177 through 192
   176   177   178   179   180   181   182   183   184   185   186   187   188   189   190   191
  Columns 193 through 208
   192   193   194   195   196   197   198   199   200   201   202   203   204   205   206   207
  Columns 209 through 224
   208   209   210   211   212   213   214   215   216   217   218   219   220   221   222   223
  Columns 225 through 240
   224   225   226   227   228   229   230   231   232   233   234   235   236   237   238   239
  Columns 241 through 256
   240   241   242   243   244   245   246   247   248   249   250   251   252   253   254   255
  Columns 257 through 272
   256   257   258   259   260   261   262   263   264   265   266   267   268   269   270   271
  Columns 273 through 288
   272   273   274   275   276   277   278   279   280   281   282   283   284   285   286   287
  Columns 289 through 304
   288   289   290   291   292   293   294   295   296   297   298   299   300   301   302   303
  Columns 305 through 320
   304   305   306   307   308   309   310   311   312   313   314   315   316   317   318   319
  Columns 321 through 336
   320   321   322   323   324   325   326   327   328   329   330   331   332   333   334   335
  Columns 337 through 352
   336   337   338   339   340   341   342   343   344   345   346   347   348   349   350   351
  Columns 353 through 368
   352   353   354   355   356   357   358   359   360   361   362   363   364   365   366   367
  Columns 369 through 384
   368   369   370   371   372   373   374   375   376   377   378   379   380   381   382   383
  Columns 385 through 400
   384   385   386   387   388   389   390   391   392   393   394   395   396   397   398   399
  Columns 401 through 416
   400   401   402   403   404   405   406   407   408   409   410   411   412   413   414   415
  Columns 417 through 432
   416   417   418   419   420   421   422   423   424   425   426   427   428   429   430   431
  Columns 433 through 448
   432   433   434   435   436   437   438   439   440   441   442   443   444   445   446   447
  Columns 449 through 464
   448   449   450   451   452   453   454   455   456   457   458   459   460   461   462   463
  Columns 465 through 480
   464   465   466   467   468   469   470   471   472   473   474   475   476   477   478   479
  Columns 481 through 496
   480   481   482   483   484   485   486   487   488   489   490   491   492   493   494   495
  Columns 497 through 512
   496   497   498   499   500   501   502   503   504   505   506   507   508   509   510   511
  Columns 513 through 528
   512   513   514   515   516   517   518   519   520   521   522   523   524   525   526   527
  Columns 529 through 544
   528   529   530   531   532   533   534   535   536   537   538   539   540   541   542   543
  Columns 545 through 560
   544   545   546   547   548   549   550   551   552   553   554   555   556   557   558   559
  Columns 561 through 576
   560   561   562   563   564   565   566   567   568   569   570   571   572   573   574   575
  Columns 577 through 592
   576   577   578   579   580   581   582   583   584   585   586   587   588   589   590   591
  Columns 593 through 608
   592   593   594   595   596   597   598   599   600   601   602   603   604   605   606   607
  Columns 609 through 624
   608   609   610   611   612   613   614   615   616   617   618   619   620   621   622   623
  Columns 625 through 640
   624   625   626   627   628   629   630   631   632   633   634   635   636   637   638   639
  Columns 641 through 656
   640   641   642   643   644   645   646   647   648   649   650   651   652   653   654   655
  Columns 657 through 672
   656   657   658   659   660   661   662   663   664   665   666   667   668   669   670   671
  Columns 673 through 688
   672   673   674   675   676   677   678   679   680   681   682   683   684   685   686   687
  Columns 689 through 704
   688   689   690   691   692   693   694   695   696   697   698   699   700   701   702   703
  Columns 705 through 720
   704   705   706   707   708   709   710   711   712   713   714   715   716   717   718   719
  Columns 721 through 736
   720   721   722   723   724   725   726   727   728   729   730   731   732   733   734   735
  Columns 737 through 752
   736   737   738   739   740   741   742   743   744   745   746   747   748   749   750   751
  Columns 753 through 768
   752   753   754   755   756   757   758   759   760   761   762   763   764   765   766   767
  Columns 769 through 784
   768   769   770   771   772   773   774   775   776   777   778   779   780   781   782   783
  Columns 785 through 800
   784   785   786   787   788   789   790   791   792   793   794   795   796   797   798   799
  Columns 801 through 816
   800   801   802   803   804   805   806   807   808   809   810   811   812   813   814   815
  Columns 817 through 832
   816   817   818   819   820   821   822   823   824   825   826   827   828   829   830   831
  Columns 833 through 842
   832   833   834   835   836   837   838   839   840   841
6
Pass
 
%%
n = randi(1000);
a = tril(ones(n),-1);
z_correct = 1:n;
assert(isequal(lastzerorow(a),z_correct))
ans =
  Columns 1 through 16
     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16
  Columns 17 through 32
    17    18    19    20    21    22    23    24    25    26    27    28    29    30    31    32
  Columns 33 through 48
    33    34    35    36    37    38    39    40    41    42    43    44    45    46    47    48
  Columns 49 through 64
    49    50    51    52    53    54    55    56    57    58    59    60    61    62    63    64
  Columns 65 through 80
    65    66    67    68    69    70    71    72    73    74    75    76    77    78    79    80
  Columns 81 through 96
    81    82    83    84    85    86    87    88    89    90    91    92    93    94    95    96
  Columns 97 through 112
    97    98    99   100   101   102   103   104   105   106   107   108   109   110   111   112
  Columns 113 through 128
   113   114   115   116   117   118   119   120   121   122   123   124   125   126   127   128
  Columns 129 through 144
   129   130   131   132   133   134   135   136   137   138   139   140   141   142   143   144
  Columns 145 through 160
   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159   160
  Columns 161 through 167
   161   162   163   164   165   166   167
7
Pass
 
%%
n = randi(1000);
d = randi(n-1);
a = tril(ones(n),-d);
z_correct = min((0:n-1)+d,n);
assert(isequal(lastzerorow(a),z_correct))
ans =
  Columns 1 through 16
    95    96    97    98    99   100   101   102   103   104   105   106   107   108   109   110
  Columns 17 through 32
   111   112   113   114   115   116   117   118   119   120   121   122   123   124   125   126
  Columns 33 through 48
   127   128   129   130   131   132   133   134   135   136   137   138   139   140   141   142
  Columns 49 through 64
   143   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158
  Columns 65 through 80
   159   160   161   162   163   164   165   166   167   168   169   170   171   172   173   174
  Columns 81 through 96
   175   176   177   178   179   180   181   182   183   184   185   186   187   188   189   190
  Columns 97 through 112
   191   192   193   194   195   196   197   198   199   200   201   202   203   204   205   206
  Columns 113 through 128
   207   208   209   210   211   212   213   214   215   216   217   218   219   220   221   222
  Columns 129 through 144
   223   224   225   226   227   228   229   230   231   232   233   234   235   236   237   238
  Columns 145 through 160
   239   240   241   242   243   244   245   246   247   248   249   250   251   252   253   254
  Columns 161 through 176
   255   256   257   258   259   260   261   262   263   264   265   266   267   268   269   270
  Columns 177 through 192
   271   272   273   274   275   276   277   278   279   280   281   282   283   284   285   286
  Columns 193 through 208
   287   288   289   290   291   292   293   294   295   296   297   298   299   300   301   302
  Columns 209 through 224
   303   304   305   306   307   308   309   310   311   312   313   314   315   316   317   318
  Columns 225 through 240
   319   320   321   322   323   324   325   326   327   328   329   330   331   332   333   334
  Columns 241 through 256
   335   336   337   338   339   340   341   342   343   344   345   346   347   348   349   350
  Columns 257 through 272
   351   352   353   354   355   356   357   358   359   360   361   362   363   364   365   366
  Columns 273 through 288
   367   368   369   370   371   372   373   374   375   376   377   378   379   380   381   382
  Columns 289 through 304
   383   384   385   386   387   388   389   390   391   392   393   394   395   396   397   398
  Columns 305 through 320
   399   400   401   402   403   404   405   406   407   408   409   410   411   412   413   414
  Columns 321 through 336
   415   416   417   418   419   420   421   422   423   424   425   426   427   428   429   430
  Columns 337 through 352
   431   432   433   434   435   436   437   438   439   440   441   442   443   444   445   446
  Columns 353 through 368
   447   448   449   450   451   452   453   454   455   456   457   458   459   460   461   462
  Columns 369 through 384
   463   464   465   466   467   468   469   470   471   472   473   474   475   476   477   478
  Columns 385 through 400
   479   480   481   482   483   484   485   486   487   488   489   490   491   492   493   494
  Columns 401 through 416
   495   496   497   498   499   500   501   502   503   504   505   506   507   508   509   510
  Columns 417 through 432
   511   512   513   514   515   516   517   518   519   520   521   522   523   524   525   526
  Columns 433 through 448
   527   528   529   530   531   532   533   534   535   536   537   538   539   540   541   542
  Columns 449 through 464
   543   544   545   546   547   548   549   550   551   552   553   554   555   556   557   558
  Columns 465 through 480
   559   560   561   562   563   564   565   566   567   568   569   570   571   572   573   574
  Columns 481 through 496
   575   576   577   578   579   580   581   582   583   584   585   586   587   588   589   590
  Columns 497 through 512
   591   592   593   594   595   596   597   598   599   600   601   602   603   604   605   606
  Columns 513 through 528
   607   608   609   610   611   612   613   614   615   616   617   618   619   620   621   622
  Columns 529 through 544
   623   624   625   626   627   628   629   630   631   632   633   634   635   636   637   638
  Columns 545 through 560
   639   640   641   642   643   644   645   646   647   648   649   650   651   652   653   654
  Columns 561 through 576
   655   656   657   658   659   660   661   662   663   664   665   666   667   668   669   670
  Columns 577 through 592
   671   672   673   674   675   676   677   678   679   680   681   682   683   684   685   686
  Columns 593 through 608
   687   688   689   690   691   692   693   694   695   696   697   698   699   700   701   702
  Columns 609 through 624
   703   704   705   706   707   708   709   710   711   712   713   714   715   716   717   718
  Columns 625 through 640
   719   720   721   722   723   724   725   726   727   728   729   730   731   732   733   734
  Columns 641 through 656
   735   736   737   738   739   740   741   742   743   744   745   746   747   748   749   750
  Columns 657 through 672
   751   752   753   754   755   756   757   758   759   760   761   762   763   764   765   766
  Columns 673 through 688
   767   768   769   770   771   772   773   774   775   776   777   778   779   780   781   782
  Columns 689 through 704
   783   784   785   786   787   788   789   790   791   792   793   794   795   796   797   798
  Columns 705 through 720
   799   800   801   802   803   804   805   806   807   808   809   810   811   812   813   814
  Columns 721 through 736
   815   816   817   818   819   820   821   822   823   824   825   826   827   828   829   830
  Columns 737 through 752
   831   832   833   834   835   836   837   838   839   840   841   842   843   844   845   846
  Columns 753 through 768
   847   848   849   850   851   852   853   854   855   856   857   858   859   860   861   862
  Columns 769 through 784
   863   864   865   866   867   868   869   870   871   872   873   874   875   876   877   878
  Columns 785 through 800
   879   880   881   882   883   884   885   886   887   888   889   890   891   892   893   894
  Columns 801 through 816
   895   896   897   898   899   900   901   902   903   904   904   904   904   904   904   904
  Columns 817 through 832
   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904
  Columns 833 through 848
   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904
  Columns 849 through 864
   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904
  Columns 865 through 880
   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904
  Columns 881 through 896
   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904   904
  Columns 897 through 904
   904   904   904   904   904   904   904   904
8
Pass
 
%%
a = magic(10)-1;
z_correct = [0 0 1 0 0 0 0 0 0 0];
assert(isequal(lastzerorow(a),z_correct))
ans =
     0     0     1     0     0     0     0     0     0     0
9
Pass
 
%%
a = [0 0 9 0;
     0 0 1 8;
     0 0 4 0;
     0 0 2 3;
     0 6 7 5];
z_correct = [5 4 0 3];
assert(isequal(lastzerorow(a),z_correct))
ans =
     5     4     0     3
10
Pass
 
%%
a = [0  0  0  0 -4  0  0 0 0;
     0  0  0 -3 -3 -3  0 0 0;
     0  0 -2  3 -2  2  2 0 0;
     0 -1  2 -1  1 -1 -1 1 0];
z_correct = [4 3 2 1 0 1 2 3 4];
assert(isequal(lastzerorow(a),z_correct))
ans =
     4     3     2     1     0     1     2     3     4