def branch_and_bound(entrada):
global length_of_x, conjuntos_de_x, coeficientes
length_of_x, conjuntos_de_x, coeficientes = load.loadFileEx(entrada)
#print(conjuntos_de_x)
initial_x_set = create_initial_x_set(length_of_x)
array_de_nos = create_initial_array_de_nos()
max_value = create_initial_max_value()
max_set = []
x = 1
last_x = length_of_x
while (x <= last_x) and (len(array_de_nos) > 0):
#print ("x atual e " + str(x) + " | max value e " + str(max_value) + " | set size e " + str(len(array_de_nos)))
novo_set = []
for set in array_de_nos:
set_inverted = copy.deepcopy(set)
if (set_inverted[x] == 1):
set_inverted[x] = 0
else:
set_inverted[x] = 1
novo_set.append(set_inverted)
same_set = copy.deepcopy(set)
novo_set.append(same_set)
array_de_nos = novo_set
for set in array_de_nos:
f_result = bb.resultado_de_soma(set, conjuntos_de_x, coeficientes,
length_of_x)
max_value = max(max_value, f_result)
#print(str(set) + " " + str(f_result) + " " + str(max_value))
#print(max_set)
#print(set)
if max_value == f_result:
#print("Substitute")
max_set = copy.deepcopy(set)
#print("new max_set")
#print(max_set)
#print("---------------------------------")
array_de_nos = apply_bound(array_de_nos)
x = x + 1
#print(max_set)
#print(bb.resultado_de_soma(max_set, conjuntos_de_x, coeficientes,length_of_x))
return max_set, bb.resultado_de_soma(max_set, conjuntos_de_x, coeficientes,
length_of_x)
def branch_and_bound():
initial_x_set = create_initial_x_set(x_size)
array_de_nos = []
array_de_nos.append(initial_x_set)
relax_function_value = relax_function(conjuntos_de_x, coeficientes)
max_value = relax_function_value
max_set = []
x = 0
last_x = length_of_x-1
while(x <= last_x) and (len(array_de_nos) > 0):
novo_set = []
for set in array_de_nos:
set_with = set
set[x] = 1
novo_set.append(set_with)
set_without = set
novo_set.append(set_without)
array_de_nos = novo_set
for set in array_de_nos:
f_result = bb.resultado_de_soma(set, conjuntos_de_x, coeficientes, length_of_x)
max_value = max(max_value, f_result)
#print(max_value)
#print(f_result)
#print(max_set)
#print(set)
if max_value == f_result:
#print("Substitute")
max_set = copy.deepcopy(set)
#print("new max_set")
#print(max_set)
#print("---------------------------------")
length_set = len(array_de_nos)
i = 0
#da pra melhorar essa parte para nao ter que fazer DOIS calculos seguindos
while (i < len(array_de_nos)):
if (bb.resultado_de_soma(array_de_nos[i], conjuntos_de_x, coeficientes, length_of_x) < max_value):
array_de_nos.remove(array_de_nos[i])
else: i = i+1
x = x+1
print(max_set)
print(bb.resultado_de_soma(max_set, conjuntos_de_x, coeficientes,length_of_x))
def branch_and_bound():
print(length_of_x)
initial_x_set = create_initial_x_set(length_of_x)
array_de_nos = create_initial_array_de_nos()
max_value = create_initial_max_value()
max_set = []
x = 1
last_x = length_of_x
while (x <= last_x) and (len(array_de_nos) > 0):
print("x atual e " + str(x))
novo_set = []
print(x)
for set in array_de_nos:
set_with = copy.deepcopy(set)
set_with[x] = 1
novo_set.append(set_with)
set_without = copy.deepcopy(set)
novo_set.append(set_without)
array_de_nos = novo_set
for set in array_de_nos:
f_result = bb.resultado_de_soma(set, conjuntos_de_x, coeficientes,
length_of_x)
max_value = max(max_value, f_result)
print(max_value)
#print(f_result)
#print(max_set)
#print(set)
if max_value == f_result:
#print("Substitute")
max_set = copy.deepcopy(set)
#print("new max_set")
#print(max_set)
#print("---------------------------------")
array_de_nos = apply_bound(array_de_nos)
x = x + 1
print(max_set)
print(
bb.resultado_de_soma(max_set, conjuntos_de_x, coeficientes,
length_of_x))
def apply_bound(array_de_nos):
quant = len(array_de_nos)
i = 0
soma = 0
while (i < quant):
soma += bb.resultado_de_soma(array_de_nos[i], conjuntos_de_x,
coeficientes, length_of_x)
i += 1
media = soma / quant
i = 0
while (i < quant):
if bb.resultado_de_soma(array_de_nos[i], conjuntos_de_x, coeficientes,
length_of_x) < media:
del array_de_nos[i]
quant = len(array_de_nos)
else:
i += 1
return array_de_nos
def branch_and_bound():
print(length_of_x)
initial_x_set = create_initial_x_set(length_of_x)
array_de_nos = []
array_de_nos.append(initial_x_set)
relax_function_value = relax_function(conjuntos_de_x, coeficientes)
max_value = relax_function_value
max_set = []
x = 1
last_x = length_of_x
initial_bound = -1000
max_quantidade_de_x = 4
while(x <= last_x) and (len(array_de_nos) > 0):
novo_set = []
print(x)
for set in array_de_nos:
set_with = copy.deepcopy(set)
set_with[x] = 1
novo_set.append(set_with)
set_without = copy.deepcopy(set)
novo_set.append(set_without)
array_de_nos = novo_set
for set in array_de_nos:
f_result = bb.resultado_de_soma(set, conjuntos_de_x, coeficientes, length_of_x)
max_value = max(max_value, f_result)
#print(max_value)
#print(f_result)
#print(max_set)
#print(set)
if max_value == f_result:
print("Substitute")
max_set = copy.deepcopy(set)
print("new max_set")
print(max_set)
print("---------------------------------")
length_set = len(array_de_nos)
i = 0
#da pra melhorar essa parte para nao ter que fazer DOIS calculos seguindos
while (i < len(array_de_nos)):
if (bb.resultado_de_soma(array_de_nos[i], conjuntos_de_x, coeficientes, length_of_x) < initial_bound):
print(bb.resultado_de_soma(array_de_nos[i], conjuntos_de_x, coeficientes, length_of_x))
array_de_nos.remove(array_de_nos[i])
initial_bound = initial_bound+1
elif (quant_of_x(array_de_nos[i]) > max_quantidade_de_x):
print(array_de_nos[i])
#array_de_nos.remove(array_de_nos[i])
del array_de_nos[i]
else: i = i+1
x = x+1
print(max_set)
print(bb.resultado_de_soma(max_set, conjuntos_de_x, coeficientes,length_of_x))