四进制解码
密文直输版
ciphertxt = '1212 1230 1201 1213 1323 1012 1233 1311 1302 1202 1201 1303 1211 301 302 303 1331'
c = ciphertxt.split(' ')
flag = ''
for i in c:
temp = 0
for j in range(len(i)):
temp += (4**j)*int(i[-j-1])
flag += chr(int(temp))
print(flag)
txt版
m = ''
with open("txt","r") as f:
text = f.read()
c = text.split(" ")
for i in c:
temp = 0
for j in range(len(i)):
temp += (4**j)*int(i[-j-1])
m += chr(int(temp))
print(m)