Cody

# Problem 793. Combinations without using nchoosek

Solution 1446167

Submitted on 21 Feb 2018 by gregz
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### 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')))

filetext = 'function out = your_fcn_name(N) % out = zeros(factorial(N)/(factorial(N-2)*2),2); % ii=1; out = []; for i=1:N-1 for j=i+1:N out = [out; [i j]]; % out(ii,:) = [i j]; % ii = ii+1; end end %This code written by profile_id 9053098 '

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')))

filetext = 'function out = your_fcn_name(N) % out = zeros(factorial(N)/(factorial(N-2)*2),2); % ii=1; out = []; for i=1:N-1 for j=i+1:N out = [out; [i j]]; % out(ii,:) = [i j]; % ii = ii+1; end end %This code written by profile_id 9053098 '

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')))

filetext = 'function out = your_fcn_name(N) % out = zeros(factorial(N)/(factorial(N-2)*2),2); % ii=1; out = []; for i=1:N-1 for j=i+1:N out = [out; [i j]]; % out(ii,:) = [i j]; % ii = ii+1; end end %This code written by profile_id 9053098 '

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 filetext = 'function out = your_fcn_name(N) % out = zeros(factorial(N)/(factorial(N-2)*2),2); % ii=1; out = []; for i=1:N-1 for j=i+1:N out = [out; [i j]]; % out(ii,:) = [i j]; % ii = ii+1; end end %This code written by profile_id 9053098 '