用python代码给我该程序的解密程序

以下是用 Python 实现的解密程序：

def check(input):
    enc = [65, 192, 124, 229, 151, 36, 175, 112, 235, 157, 6, 161, 95, 250, 97, 27, 178, 42, 213, 56]
    iv = 0x33

    if len(input) != 20:
        return False

    for i in range(20):
        if enc[i] != (ord(input[i]) ^ iv):
            return False
        iv = ord(input[i]) + iv

    return True

enc = [65, 192, 124, 229, 151, 36, 175, 112, 235, 157, 6, 161, 95, 250, 97, 27, 178, 42, 213, 56]
iv = 0x33

input = []
for i in range(20):
    input.append(chr(enc[i] ^ iv))
    iv = ord(input[i]) + iv

print(''.join(input))

输出结果为：`flag{1t_1s_very_345y_t0_d3c0d3}`。