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关键函数
循环输入的字符串，把大写转小写，小写转大写，经过异或计算后得到的结果和 GONDPHyGjPEKruv{{pj]X@rF 比较。
arr = [0x0D, 0x13, 0x17, 0x11, 0x2, 0x1, 0x20, 0x1D, 0x0C, 0x2, 0x19, 0x2F, 0x17, 0x2B, 0x24, 0x1F, 0x1E, 0x16, 0x9,
0x0F, 0x15, 0x27, 0x13, 0x26, 0x0A, 0x2F, 0x1E, 0x1A, 0x2D, 0x0C, 0x22, 0x4]
s = 'GONDPHyGjPEKruv{{pj]X@rF'
k = 0
flag = ''
for i in s:
flag += chr(((ord(i) ^ arr[k]) - 72) ^ 0x55)
k = k + 1
print flag