Rating changes for last rounds are temporarily rolled back. They will be returned soon. ×

1.LaZyPersoN's blog

By 1.LaZyPersoN, history, 2 months ago, In English

Problem statement,

you are given an array of positive integers of size n, and an integer k.
for each pair of (i, j) in the array, where 1 <= i <=n and 1 <= j <=n, m is the minimum value such that lcm(a[i], a[j]) * m is a multiple of k.
you need to find the sum of values of m. i.e find the m for each pair and then take the sum of these value.

$$${s} = \sum_{i=1}^{n}\sum_{j=1}^n {m}$$$

constraints:
$$${1} \leq{n} \leq{10}^{5}$$$
$$${1} \leq{k} \leq{10}^{6}$$$
$$${1} \leq{a[i]} \leq{10}^{9}$$$

I encountered this problem in an OA.

if anybody can provide solution to this, I would be very happy.
Thanks In Advance!

Full text and comments »

  • Vote: I like it
  • +6
  • Vote: I do not like it

By 1.LaZyPersoN, history, 10 months ago, In English

I want to see how many reply will require on a single comment such that the last reply contains single character on each line.

Full text and comments »

  • Vote: I like it
  • -4
  • Vote: I do not like it

By 1.LaZyPersoN, history, 13 months ago, In English

According to wikipedia, Bitonic sort complexity is log^2n. Is it true ?

Full text and comments »

  • Vote: I like it
  • +3
  • Vote: I do not like it