add BF1.py
it was not the right algorithm
re-factor code
fix typo
fix typo again
re-factor
re-factor min()
improve algorithm
change exchangeNumberArr to be exactChangeNumberArr
assume second number is 5
pre-selected denominations
remove sums
change BF1.py to getMinECN_realTime.py
implement command line parameter
mkdir for ECN and move all files there
solution of the second problem
change for dollar
add verify.py in EN
modify verify.py, add testVerify.py, changed the algorithm in firstStep.py
rm selectedSums