You are given an array of `$N$`

integers. Count the number of pairs whose sum is divisible by `$5$`

in the given array.

This is a companion discussion topic for the original entry at https://toph.co/p/counting-pairs

You are given an array of `$N$`

integers. Count the number of pairs whose sum is divisible by `$5$`

in the given array.

This is a companion discussion topic for the original entry at https://toph.co/p/counting-pairs