Problem
Teachers' Notes
Hint
Solution
Count the Digits
21322314 comes from 1123 in 8 steps
1223 in 8 steps
1233 in 8 steps
1134 in 5 steps
1334 in 5 steps
1344 in 5 steps
31123314 comes from 1244 in 5 steps
1124 in 5 steps
1224 in 5 steps
2234 in 4 steps
2334 in 4 steps
2344 in 4 steps