Cody

# Problem 793. Combinations without using nchoosek

Solution 2069828

Submitted on 26 Dec 2019 by Tomas Scagliarini
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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 output = your_fcn_name(n) j = 1; for i = 1:n rest = setdiff(1:n,1:i); for k = 1:numel(rest) output(j,1) = i; output(j,2) = rest(k); j = j + 1; end end end %This code written by profile_id 7832593 '

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 output = your_fcn_name(n) j = 1; for i = 1:n rest = setdiff(1:n,1:i); for k = 1:numel(rest) output(j,1) = i; output(j,2) = rest(k); j = j + 1; end end end %This code written by profile_id 7832593 '

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 output = your_fcn_name(n) j = 1; for i = 1:n rest = setdiff(1:n,1:i); for k = 1:numel(rest) output(j,1) = i; output(j,2) = rest(k); j = j + 1; end end end %This code written by profile_id 7832593 '

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 output = your_fcn_name(n) j = 1; for i = 1:n rest = setdiff(1:n,1:i); for k = 1:numel(rest) output(j,1) = i; output(j,2) = rest(k); j = j + 1; end end end %This code written by profile_id 7832593 '