Cody

# Problem 793. Combinations without using nchoosek

Solution 103414

Submitted on 27 Jun 2012 by Richard Zapor
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

### Test Suite

Test Status Code Input and Output
1   Pass
%% n = 3; y_correct = nchoosek(1:n,2); assert(isequal(your_fcn_name(n),y_correct)) % Prevents cheating filetext = fileread('your_fcn_name.m') assert(isempty(strfind(filetext, 'nchoosek')))

``` ptr = 0 filetext = function nc2 = your_fcn_name(n) ptr=0 for i=1:n-1 for j=i+1:n ptr=ptr+1; nc2(ptr,1)=i; nc2(ptr,2)=j; end end end %This code written by profile_id 2789428 ```

2   Pass
%% n = 25; y_correct = nchoosek(1:n,2); assert(isequal(your_fcn_name(n),y_correct)) filetext = fileread('your_fcn_name.m') assert(isempty(strfind(filetext, 'nchoosek')))

``` ptr = 0 filetext = function nc2 = your_fcn_name(n) ptr=0 for i=1:n-1 for j=i+1:n ptr=ptr+1; nc2(ptr,1)=i; nc2(ptr,2)=j; end end end %This code written by profile_id 2789428 ```

3   Pass
%% n = 112; y_correct = nchoosek(1:n,2); assert(isequal(your_fcn_name(n),y_correct)) filetext = fileread('your_fcn_name.m') assert(isempty(strfind(filetext, 'nchoosek')))

``` ptr = 0 filetext = function nc2 = your_fcn_name(n) ptr=0 for i=1:n-1 for j=i+1:n ptr=ptr+1; nc2(ptr,1)=i; nc2(ptr,2)=j; end end end %This code written by profile_id 2789428 ```

4   Pass
%% n = 2 y_correct = nchoosek(1:n,2); assert(isequal(your_fcn_name(n),y_correct)) filetext = fileread('your_fcn_name.m') assert(isempty(strfind(filetext, 'nchoosek')))

``` n = 2 ptr = 0 filetext = function nc2 = your_fcn_name(n) ptr=0 for i=1:n-1 for j=i+1:n ptr=ptr+1; nc2(ptr,1)=i; nc2(ptr,2)=j; end end end %This code written by profile_id 2789428 ```