d = n*(n - 3)/2
d = 12*(12 - 3)/2 = 6*9 = 54
d = 10*(10 - 3)/2 = 5*7 = 35
d = 17*(17 - 3)/2 = 17*7 = 119
pronto
d=12(12-3)/2
d=6*9
d=54
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Verified answer
d = n*(n - 3)/2
d = 12*(12 - 3)/2 = 6*9 = 54
d = 10*(10 - 3)/2 = 5*7 = 35
d = 17*(17 - 3)/2 = 17*7 = 119
pronto
d=12(12-3)/2
d=6*9
d=54