24 May 2020

NT master - m0lecon 2020 Teaser - misc

This is the prompt of the challenge:

$ nc challs.m0lecon.it 10000
I'll give you a positive integer N, can you give me two positive integers a,b
such that a>b and gcd(a,b)+lcm(a,b)=N? You must send the values of a and b
separated by a space.
You have 1 second for each of the 10 tests.

We can observe that a = N-1, b = 1 always satisfy gcd(a,b)+lcm(a,b)=N