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| from pwn import *
context.log_level = 'debug'
proc = remote("node4.anna.nssctf.cn", 28793)
def sl(x): return proc.sendline(x)
def sd(x): return proc.send(x)
def sla(x, y): return proc.sendlineafter(x, y)
def sa(x, y): return proc.sendafter(x, y)
def ru(x): return proc.recvuntil(x)
def rc(): return proc.recv()
def rl(): return proc.recvline()
def li(con): return log.info(con)
def ls(con): return log.success(con)
def pi(): return proc.interactive()
def pcls(): return proc.close()
d = {'//': '*', 'x': '-', '-': '+', '%': '//', '+': '%'}
sla(b'start...', b'')
for i in range(301):
ru(b'Round')
ru(b'\n')
epr = ru(b'= ')[:-3].decode().split(' ')
epr[1] = d[epr[1]]
epr = ''.join(epr)
print(epr)
sl(str(eval(epr)).encode())
|