题解 | #进制转换#

数制转换的关键就是找出对应位置的系数，我这里用的是ascil码

try:
    while True:
        str1 = str(input())

        num1 = []
        flag = 0
        k = 0 
        for i in str1:
            if flag < 2:
                flag += 1
            else:
                if i != ' ':
                    k += 1
                    num1.append(i)

        ans = 0
        for j in range(k):
            if (ord(num1[j]) >= 65 and ord(num1[j]) <= 70):
                ans += (ord(num1[j])-ord('A')+10)*(16**(k-j-1))
            elif (ord(num1[j]) >= 48 and ord(num1[j]) <= 57):
                ans += (ord(num1[j])-ord('0'))*(16**(k-j-1))
            elif (ord(num1[j]) >= 97 and ord(num1[j]) <= 122):
                ans += (ord(num1[j])-ord('a')+10)*(16**(k-j-1))
            else:
                ans = ans

        print(ans)
except:
    pass