题解 | #进制转换#

import sys

def toDecimal(hex_str, base=16):
    if '0x' in hex_str:
        result = int(hex_str, base)
        return result
    else:
        return ''

if __name__ == '__main__':
    hex_ori = sys.stdin.readline().strip()
    result = toDecimal(hex_ori)
    print(result)