def solve_with_bst(self):
nb_solutions = 0
small_x, small_y = 0, 0
active_segments = defaultdict(list)
r = bst.Node(0)
for y in xrange(self.col+1):
new_segment = g.dh_lines[y]
end_segment = active_segments[y] == y
vertical_range = g.dv_lines[y]
if new_segment: #there is a new left endpoint
# TODO consider new_segment as a possible list
left_endpoint = new_segment[0][0]
right_endpoint = new_segment[0][1]
node_value = new_segment[1]
bst.insert(r, bst.Node(node_value))
active_segments[right_endpoint].append(node_value)
if end_segment: # if the segment coming to an end
active_segments[y].remove(end_segment)
bst.delete(r,end_segment)
if vertical_range:
solutions = bst.search_range(r, vertical_range[0],vertical_range[1])
if solutions:
if not small_x:
small_x, small_y = [solutions[0],y]
nb_solutions += len(solutions)
print nb_solutions, small_x, small_y
def find_intersection(segments):
#seperate start pts and end pts
segPts = []
for pt in segments:
segPts.append([pt[0],pt, 0]) #start pt
segPts.append([pt[1],pt, 1]) #end pt
#sort the segments by x value
segPts.sort() #O(n log n)
segTree = None
for seg in segPts: #sweeping from left to right
if seg[2] == 0: #it's a start pt
if seg[1][0][1] == seg[1][1][1]: #horiz line
segTree = insert(segTree, seg[1][0][1]) #insert the y value
continue
if seg[1][0][0] == seg[1][1][0]: #vertical line
#check segTree for at least y start value of vert line
bound = seg[1][0][1] #vert line y start val
check = get_smallest_at_least(segTree, bound)
if not check is None:
if check.key < seg[1][1][1]:
#the horiz y val is less than the vert line end pt y val
xReturn = seg[1][0][0]
yReturn = check.key
return(xReturn, yReturn)
if seg[2] == 1: #it's an end pt
if seg[1][0][1] == seg[1][1][1]: #horiz line
segTree = delete(segTree, seg[1][0][1])
else:
continue
#no intersections
return None
def delete(self, key):
"""deletes a key and its associated value from tree, calls delete function in bst.py
Args:
key (*) : a key which is compareable by <,>,==
"""
self.tree = bst.delete(self.tree, key)
self.num_items -= 1
def test_bst4(self):
t = None
t = bst.insert(t, 4, 'four')
t = bst.insert(t, 2, 'two')
t = bst.insert(t, 3, 'three')
t = bst.insert(t, 1, 'one')
t = bst.insert(t, 7, 'seven')
t = bst.insert(t, 5, 'five')
t = bst.insert(t, 6, 'six')
t = bst.delete(t, 6)
self.assertEqual(bst.tree_height(t), 2)
t = bst.delete(t, 7)
self.assertEqual(bst.tree_height(t), 2)
t = bst.delete(t, 4)
self.assertEqual(bst.tree_height(t), 2)
self.assertEqual(t.key, 5)
def delete(self, key):
"""Removes a BSTNode from the tree map with the corresponding key.
Calls delete function in bst.py
Args:
key (str) : the key (last name).
"""
self.tree = delete(self.tree, key)
def find_intersection(segments):
points=[]
for i in range(len(segments)):
if segments[i][0][0] == segments[i][1][0]:
points.append((segments[i][0], 'v', segments[i])) #i ID'li VERTICAL line'a ait nokta
elif segments[i][0][1] == segments[i][1][1]:
points.append((segments[i][0], 'h')) #i ID'li HORIZONTAL line'a ait nokta
points.append((segments[i][1], 'h'))
points = sorted(points, key=lambda x: x[0][0])
#points.sort() #sorting points with respect to the x-coordinate values
# set root to be an empty tree
root = None
if len(points) == 1:
return None
for i in range(len(points)):
#print points
#if point belongs to horizontal segments
if points[i][1] == 'h':
if search(root,points[i][0][1]) == None:
#if not there then add it
root = insert(root, points[i][0][1])
else:
#if there then delete it
root = delete(root, points[i][0][1])
#if vertical line
else:
#seg is the vertical line this point belongs to
seg = points[i][2]
y1 = seg[0][1]
y2 = seg[1][1]
ymin = min(y1,y2)
ymax = max(y1,y2)
least = get_smallest_at_least(root, ymin)
if least == None:
continue
elif least.key <= ymax:
return (seg[0][0], least.key)
return None
# asegment = [((1,4),(1,7)), ((1,5),(3,5))]
# print find_intersection(asegment)
def delete(self, key):
"""Write the docstring
Args:
key (any) : a key which is compareable by <,>,==
"""
#call a function in the bst module
#and decrement the num_items
self.tree = bst.delete(self.tree, key)
self.num_items -= 1
def delete(self, key):
"""Removes the key/value pair from the tree
Args:
key (any) : a key which is compareable by <,>,==
Raises:
KeyError : if the key does not exist
"""
self.tree = bst.delete(self.tree, key)
self.num_items -= 1
def bst_experiment(n, type='t'):
root = bst.Node()
experiment_data = "{};".format(n)
clk_start = time.time()
results = get_results(n)
for el in results:
bst.insert(root, el)
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
clk_start = time.time()
bst.insert(root, "adelaida")
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
index = randint(0, len(results) - 1)
clk_start = time.time()
_, root = bst.delete(root, results[index])
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
index = randint(0, len(results) - 1)
clk_start = time.time()
bst.find(root, results[index])
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
clk_start = time.time()
bst.tree_max(root)
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
clk_start = time.time()
bst.tree_min(root)
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
index = randint(0, len(results) - 1)
clk_start = time.time()
bst.successor(root, results[index])
experiment_data += str(time.time()-clk_start)
experiment_data += ';'
clk_start = time.time()
bst.inorder_stat(root)
experiment_data += str(time.time()-clk_start)
experiment_data += '\n'
return experiment_data
def find_intersection(segments):
root = None
line_dict = {el[0][0]: el for el in segments}
for el in segments:
root = insert(root, el[0][0])
test_node = get_smallest(root)
test_key = test_node.key
active_lines = []
while(True):
test_line = line_dict[test_key]
#discard old lines
active_lines_copy = active_lines[:]
for line in active_lines_copy:
if test_key > line[1][0]:
active_lines.remove(line)
#either test line is a vertical line or a horizontal line
if test_line[0][1] == test_line[1][1]: #horizontal line
active_lines.append(test_line)
else: #vertical line
for line in active_lines:
if line[0][1] > test_line[0][1] and line[0][1] < test_line[1][1]:
return (test_line[0][0], line[0][1])
root = delete(root, test_key)
test_node = get_smallest_at_least(root, test_key)
if test_node == None:
return None
else:
test_key = test_node.key
def test_deletion(tree_and_inserted, data):
tree, inserted_keys = tree_and_inserted
assume(len(inserted_keys) > 0)
# Pick something to delete
to_delete = data.draw(nodes_to_delete(tree), label="Nodes to delete")
keys_to_delete = [node.key for node in to_delete]
for node in to_delete:
tree = delete(tree, node)
assert_bst_property_holds(tree)
keys_after_delete = [node.key for node in collect(tree)]
# assert len(inserted_keys) - len(keys_after_delete) == len(keys_to_delete)
kept_keys = set(inserted_keys) - set(keys_to_delete)
for kept_key in kept_keys:
assert kept_key in keys_after_delete
for deleted_key in keys_to_delete:
# assert deleted_key not in keys_after_delete
pass
def main():
option = sys.argv
if len(option) > 2:
if option[1] == '--type':
commands_count, commands = get_input()
try:
commands_count = int(commands_count)
except ValueError:
sys.stderr.write("Number of operations must be an integer!\n")
return
type = option[2]
t.init_stats()
clk_start = time.time()
if type == 'bst':
root = bst.Node()
for command in commands:
try:
if len(command) != 0:
if command[0] == 'insert':
element = t.make_cut(command[1])
if element != -1:
bst.insert(root, element)
else:
sys.stderr.write("Invalid symbol in {} \n".format(element))
continue
elif command[0] == 'load':
loaded = bst.load("data/{}".format(command[1]))
if loaded != 0:
root = loaded
elif command[0] == 'delete':
result, new_root = bst.delete(root, command[1])
while result == 1:
result, new_root = bst.delete(root, command[1])
root = new_root
elif command[0] == 'find':
result, _ = bst.find(root, command[1])
print(result)
elif command[0] == 'min':
node = bst.tree_min(root)
if node.value != None:
print(node.value)
else:
print()
elif command[0] == 'max':
node = bst.tree_max(root)
if node.value != None:
print(node.value)
else:
print()
elif command[0] == 'successor':
result = bst.successor(root, command[1])
if result != 0:
print(result)
else:
print()
elif command[0] == 'inorder':
bst.inorder(root)
print()
else:
sys.stderr.write("Invalid command in ", command, ("\n"))
continue
except IndexError:
sys.stderr.write("Invalid command parameters in ", command, ("\n"))
continue
elif type == 'rbt':
tree = rbt.RBT()
for command in commands:
if len(command) != 0:
if command[0] == 'insert':
element = t.make_cut(command[1])
if element != -1:
tree.insert(command[1])
else:
sys.stderr.write("Invalid symbol in {} \n".format(element))
continue
elif command[0] == 'load':
tree = rbt.RBT()
tree = tree.load("data/{}".format(command[1]))
elif command[0] == 'delete':
result = tree.delete(command[1])
while result == 1:
result = tree.delete(command[1])
elif command[0] == 'find':
result, _ = tree.find(command[1])
print(result)
elif command[0] == 'min':
minimum = tree.tree_min(tree.root)
if minimum != None:
print(minimum.value)
else:
print()
elif command[0] == 'max':
maximum = tree.tree_max(tree.root)
if maximum != None:
print(maximum.value)
else:
print()
elif command[0] == 'successor':
result = tree.successor(command[1]).value
if result != None:
print(result)
else:
print()
elif command[0] == 'inorder':
tree.inorder(tree.root)
print()
else:
sys.stderr.write("Invalid symbol in {} \n".format(command))
continue
elif type == 'hmap':
tree = hmap.HMAP_tree(100)
for command in commands:
if len(command) != 0:
if command[0] == 'insert':
element = t.make_cut(command[1])
if element != -1:
tree.insert(command[1])
else:
sys.stderr.write("Invalid symbol in {} \n".format(element))
continue
elif command[0] == 'load':
result = tree.load("data/{}".format(command[1]))
elif command[0] == 'delete':
result = tree.delete(command[1])
while result == 1:
result = tree.delete(command[1])
elif command[0] == 'find':
print(tree.find(command[1]))
elif command[0] == 'min':
print()
elif command[0] == 'max':
print()
elif command[0] == 'successor':
print()
elif command[0] == 'inorder':
print()
else:
sys.stderr.write("Invalid symbol in {} \n".format(command))
continue
else:
sys.stderr.write("Invalid structure! Available: bst, rbt or hmap!\n")
sys.stderr.write("\n")
sys.stderr.write("Total time of excecution {}\n".format(time.time()-clk_start))
print_results()
else:
sys.stderr.write("Invalid argument! Use --type !\n")
else:
sys.stderr.write("Not enough arguments! \n")
def test_bst_delete(self):
t = None
dummy_node = None #used to compare against bst 't'
dummy_node = bst.insert(dummy_node, 2, 'two')
# Empty tree
self.assertRaises(KeyError, bst.delete, t, 5)
# Deleting root
t = bst.insert(t, 4, 'four')
t = bst.delete(t, 4) # saves the delete
self.assertEqual(t, None)
# Deleting root single child
t = bst.insert(t, 2, 'two')
t = bst.insert(t, 5, 'five')
self.assertEqual(bst.delete(t, 5), dummy_node)
# Checking KeyError for non-empty tree
self.assertRaises(KeyError, bst.delete, t, 99)
t2 = None
t2 = bst.insert(t2, 4, 'four')
t2 = bst.insert(t2, 2, 'two')
t2 = bst.insert(t2, 5, 'five')
t2 = bst.insert(t2, 1, 'one')
t2 = bst.insert(t2, 0, 'zero')
t2 = bst.insert(t2, 3, 'three')
t2 = bst.insert(t2, 9, 'nine')
t2 = bst.insert(t2, 6, 'six')
t2 = bst.insert(t2, 7, 'seven')
t2 = bst.insert(t2, 8, 'eight')
t_list = bst.inorder_list(t2)
# print(t_list)
t2 = bst.delete(t2, 1)
t2 = bst.delete(t2, 2)
t2 = bst.delete(t2, 3)
t2 = bst.delete(t2, 4)
t2 = bst.delete(t2, 5)
t_list = bst.inorder_list(t2)
self.assertEqual(t_list, [0, 6, 7, 8, 9])
t2 = bst.delete(t2, 6)
t2 = bst.delete(t2, 7)
t2 = bst.delete(t2, 8)
t2 = bst.delete(t2, 9)
t2 = bst.delete(t2, 0)
t_list = bst.inorder_list(t2)
self.assertEqual(t_list, None)