how to solve this?
Total no of vertices=10.
Total no of components=5 and all are equaly sized components (10/2=5).
SO each component contains 2 vertices and no of edges for 2 vertices is 1.
Total of 5 components and hence max no of edges=5.
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Gatecse
You indeed made a funny mistake here ...
Transllation: (though I'm not that good in ...