Problems solved: 19

2+1	Permutational Polynomial	Friendly rooks
Half of Octahedron	Convex triangle	2020 Palindromes
C Sum	Sum of four	5th power equation
Again these rooks	Relatively prime with 2020	NRD pair
Switchers	VNT	Odd polynomial
Oh-matrix	Test	Random answer
Numbers ratio

Games

Under construction