Question:
There are n
rings and each ring is either red, green, or blue. The rings are distributed across ten rods labeled from 0
to 9
.
You are given a string rings
of length 2n
that describes the n
rings that are placed onto the rods. Every two characters in rings
forms a color-position pair that is used to describe each ring where:
- The first character of the
ith
pair denotes theith
ring's color ('R'
,'G'
,'B'
). - The second character of the
ith
pair denotes the rod that theith
ring is placed on ('0'
to'9'
).
For example, "R3G2B1"
describes n == 3<