input_list = input().split()[0]
result = eval(input_list)

list1=[]
tmp_digit = ""
n =0
for i in input_list:
    if i.isdigit():
        if n==0:      
            tmp_digit+=i
        elif n==1:
            tmp_digit = i
            n+=1
        else:
            tmp_digit+=i  
    else:
        list1.append(tmp_digit)
        list1.append(i)
        n+=1
    if i is input_list[-1]:
        list1.append(tmp_digit)
print(result)
#print(int(list1[0])+ list[1]+int(list1[2]))

谁能把我的这个手动思路补全一下，我写不出来了啊啊啊啊