Subarrays with distinct elements

#1

I am getting the wrong ans when using multiplicative modulo inverse,please tell the mistake!

#2

Here is the code https://ide.codingblocks.com/s/117525

#3

Latest update https://ide.codingblocks.com/s/117527

#4

Hello @ratik_puri,

Can you explain the following statement and the usage of power function:
long long sum=((a%mod)*((long long)power(2,mod-2)%mod))%mod;

The value that you are calculating as sum has the following formula:
sum=(len*(len+1))/2

Hope, this would help.

#5

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