Ingin menangid
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from pwn import *
v5 = ""
v2 = ord('H')
flag = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
key = "[OIonU2_<__nK<KsK"
iterator = 0
while True:
for i in flag:
if(((ord(i) + 12) * v2 + 17) % 70 + 48) == ord(key[iterator]):
v5 += i
v2 = ord(key[iterator])
iterator += 1
break
if(len(v5) == len(key)):
break
v5 = v5[:-1]
print "Key: {}".format(v5)
r = remote("rev.tamuctf.com", 7223)
r.sendline(v5)
r.interactive()