You have to generate a matrix with all possible combinations of n elements taken 2 at a time, without using nchoosek(1:n,2) :

Examples

if n = 3

output =

       1     2
       1     3
       2     3

if n = 5

output = 

       1     2
       1     3
       1     4
       1     5
       2     3
       2     4
       2     5
       3     4
       3     5
       4     5

Good luck!!

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Last Solution submitted on Feb 08, 2026

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Vasilis Bellos Hoang Minh Tri 明泉 Logan

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