#number theory

Count pairs with 1/x + 1/y = 1/N
CodingMicrosoft
▲ 00 solutions
Numbers that are a sum of two squares in exactly two ways
CodingGoogle
▲ 00 solutions
Count ways to write N as a sum of consecutive positive integers
CodingAirbnb
▲ 00 solutions
Can repeated pair additions reach a target point
CodingHardNvidiaAmazon
▲ 00 solutions
Reachable sum with reusable values and a huge target
CodingHardGoogle
▲ 01 solution