题解 | #四则运算#
四则运算
https://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
import sys
resault1 = 0
big, mid = [], []
for line in sys.stdin:
a = line.strip()
for i in range(len(a)):
if a[i] in ["[", "]"]:
mid.append(i)
for i in range(0, len(mid), 2):
str1 = f"{{{a[mid[i]+1:mid[i+1]]}}}"
str2 = str(eval(str1))
a = a[: mid[i]] + str2[1:-1] + a[mid[i + 1] + 1 :]
for i in range(len(a)):
if a[i] in ["{", "}"]:
big.append(i)
for i in range(0, len(big), 2):
str1 = f"{{{a[big[i]+1:big[i+1]]}}}"
str2 = str(eval(str1))
a = a[: big[i]] + str2[1:-1] + a[big[i + 1] + 1 :]
print(int(eval(a)))
