# 【python算法】24点()-python

## 【python算法】24点()

``````
def solution(numbers):
res = set()

def point24(numbers):
if len(numbers) == 1:
if abs(eval(numbers[0]) - 24) < 1e-10:
else:
for i in range(len(numbers)):
for j in range(i + 1, len(numbers)):
# 剩下的数字
rest_numbers = [x for p, x in enumerate(numbers) if p != i and p != j]
for op in "+-*/":
if eval(str(numbers[j])) != 0:
point24(["(" + str(numbers[i]) + op + str(numbers[j]) + ")"] + rest_numbers)
if op == "-" or (op == "/" and eval(str(numbers[i])) != 0):  # 要考虑相反的情况
point24(["(" + str(numbers[j]) + op + str(numbers[i]) + ")"] + rest_numbers)

point24(numbers)
print(res)

solution([5, 5, 5, 1])
solution([1, 3, 4, 6])
solution([10, 10, 4, 4])
solution([10, 5, 2, 1])
``````

————————
``````
def solution(numbers):
res = set()

def point24(numbers):
if len(numbers) == 1:
if abs(eval(numbers[0]) - 24) < 1e-10:
else:
for i in range(len(numbers)):
for j in range(i + 1, len(numbers)):
# 剩下的数字
rest_numbers = [x for p, x in enumerate(numbers) if p != i and p != j]
for op in "+-*/":
if eval(str(numbers[j])) != 0:
point24(["(" + str(numbers[i]) + op + str(numbers[j]) + ")"] + rest_numbers)
if op == "-" or (op == "/" and eval(str(numbers[i])) != 0):  # 要考虑相反的情况
point24(["(" + str(numbers[j]) + op + str(numbers[i]) + ")"] + rest_numbers)

point24(numbers)
print(res)

solution([5, 5, 5, 1])
solution([1, 3, 4, 6])
solution([10, 10, 4, 4])
solution([10, 5, 2, 1])
``````