Where my code is wrong? its giving the wrong answer in some test cases

#1
#2

@abhi542136 while calculating cur you are taking individual mod of ans, (n-i) and inv but multiplying all these 3 together instead multiply in a pair of two and taking mod of result of that pair like this

ll cur = ( ( ans * (n-i) )%mod * inv )%mod;

no need to take individual mod as they are already modulated and less than 10^9+7.

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#3

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