Any useful link to learn the idea o Digit DP?
To solve problems like those:
http://www.lightoj.com/volume_showproblem.php?problem=1205 http://www.lightoj.com/volume_showproblem.php?problem=1068 http://www.lightoj.com/volume_showproblem.php?problem=1122
Or any idea about solving this kinds of problems...