백준 1541번(python)

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expression = input().split('-')
for_minimum_list = []

for exp in expression:
    splited = list(map(int, exp.split('+')))
    for_minimum_list.append(sum(splited))
    
sum_value = for_minimum_list[0]
for value in for_minimum_list[1:]:
    sum_value = sum_value - value
    
print(sum_value)