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Diffstat (limited to 'OLD/csci4041/mergeSort_py.py')
| -rw-r--r-- | OLD/csci4041/mergeSort_py.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/OLD/csci4041/mergeSort_py.py b/OLD/csci4041/mergeSort_py.py new file mode 100644 index 0000000..bc9ae7d --- /dev/null +++ b/OLD/csci4041/mergeSort_py.py @@ -0,0 +1,30 @@ +def head(Q): + return Q[0] +def tail(Q): + return Q[1:] +def mergesort(U): + if U == [] or tail(U) == []: + return U + else: + L = [] + R = [] + while U != [] and tail(U) != []: + L = L+[head(U)] + U = tail(U) + R = R+[head(U)] + U = tail(U) + L = L + U + L = mergesort(L) + R = mergesort(R) + s = [] + while L != [] and R != []: + if head(L) <= head(R): + s = s + [head(L)] + L = tail(L) + else: + s = s + [head(R)] + R = tail(R) + s = s + L + R + return s + +print(mergesort([9,3,7,5,6,4,8,2]))
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