Cody

# Problem 793. Combinations without using nchoosek

Solution 1911366

Submitted on 24 Aug 2019 by David Hill
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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=nan(n*(n-1)/2,2); count=1; for i=1:n for j=i+1:n out(count,:)=[i j]; count=count+1; end end %This code written by profile_id 10491973 '

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=nan(n*(n-1)/2,2); count=1; for i=1:n for j=i+1:n out(count,:)=[i j]; count=count+1; end end %This code written by profile_id 10491973 '

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=nan(n*(n-1)/2,2); count=1; for i=1:n for j=i+1:n out(count,:)=[i j]; count=count+1; end end %This code written by profile_id 10491973 '

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=nan(n*(n-1)/2,2); count=1; for i=1:n for j=i+1:n out(count,:)=[i j]; count=count+1; end end %This code written by profile_id 10491973 '