Python: 每日一题 41

nononoyes

666

nononoyes

str = '1110'
sum =0
count = 0
for i in range(len(str)-1,-1,-1):
    if (count+1) % 2 != 0:
        sum += int(str[i])*(2**count)
        count+=1
    else:
        sum -= (int(str[i])*(2**count))
        count+=1

print(sum)

wwwwwise

1