A - Rock-paper-scissors Editorial by en_translator
Three hands \(x,y,z\) result in draw if and only if \(x+y+z \equiv 0 \bmod 3\) (which can be easily understood by drawing a tree diagram of all possibilities).
Therefore, one can obtain AC more easily by outputting \((6-x-y)\%3\).
Sample code (Python)
x,y = map(int,input().split()) print((6-x-y)%3)