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```def min_gt(seq, val):
"""
Return smallest item in seq for which item > val applies.
None is returned if seq was empty or all items in seq were <= val.

>>> min_gt([1, 3, 6, 7], 4)
6
>>> min_gt([2, 4, 7, 11], 5)
7
"""

for v in seq:
if v > val:
return v
return None

def min_ge(seq, val):
"""
Same as min_gt() except items equal to val are accepted as well.

>>> min_ge([1, 3, 6, 7], 6)
6
>>> min_ge([2, 3, 4, 8], 8)
8
"""

for v in seq:
if v >= val:
return v
return None

def max_lt(seq, val):
"""
Return greatest item in seq for which item < val applies.
None is returned if seq was empty or all items in seq were >= val.

>>> max_lt([3, 6, 7, 11], 10)
7
>>> max_lt((5, 9, 12, 13), 12)
9
"""

idx = len(seq)-1
while idx >= 0:
if seq[idx] < val:
return seq[idx]
idx -= 1
return None

def max_le(seq, val):
"""
Same as max_lt(), but items in seq equal to val apply as well.

>>> max_le([2, 3, 7, 11], 10)
7
>>> max_le((1, 3, 6, 11), 6)
6
"""

idx = len(seq)-1
while idx >= 0:
if seq[idx] <= val:
return seq[idx]
idx -= 1

return None
```

### History

• revision 3 (16 years ago)
• previous revisions are not available