finish most popular DP problems
Dynamic Programming

Includig most of the DP problems presented in the digest.
Detailed solutions and explanations of the DP problems.
Merge branch 'master' of https://github.com/JimberXin/five-minutes-algorithm
change FamouseAlgorithms.cpp into HighFrequency.cpp and  modify delBST
permutations and combinations

including all of the permutations and combinations listed in the digest.
Most of the algorithm use DFS method.
Merge branch 'master' of https://github.com/JimberXin/five-minutes-algorithm
Merge https://github.com/sunwaylive/five-minutes-algorithm
Bit Integer Operation

Including add, sub, mul, mod.
Consider only the normal case.
Merge pull request #24 from JimberXin/master

Big Integer Operation
add two dp problems and refine some issues
Merge branch 'master' of https://github.com/sunwaylive/five-minute-algorithm
delete deprecated folders
delete unused folders
update HighFrequency.cpp
Merge https://github.com/sunwaylive/five-minutes-algorithm