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idekCTF 2022* -- Manager Of The Year 1
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from pwn import * | |
r = remote('manager-of-the-year-1.chal.idek.team', 1337) | |
r.sendlineafter(b'Press any key to continue...', b'') | |
rmse = [] | |
# send 365 zero | |
r.sendlineafter(b'Enter your predictions for \'Revenue\' (in thousands) for 2023:\n', | |
' '.join(['0']*365).encode()) | |
res = r.recvline().decode() | |
rmse.append(float(res.split('(')[1].split(')')[0])) | |
# send 364 zero and 1 "100" | |
# example0: 100 0 0 0... | |
# example1: 0 100 0 0... | |
for i in range(365): | |
to_send = ['0']*365 | |
to_send[i] = '100' | |
r.sendlineafter(b'Enter your predictions for \'Revenue\' (in thousands) for 2023:\n', | |
' '.join(to_send).encode()) | |
res = r.recvline().decode() | |
rmse.append(float(res.split('(')[1].split(')')[0])) | |
# calculate the correct value by using the RMSE formula | |
n = len(rmse) - 1 # 365 | |
correct_value = [] | |
for i in range(365): | |
correct_value.append(str(round(((rmse[i+1]**2 - rmse[0]**2) * n - 100**2) / -200, 2))) | |
r.recvuntil(b'Enter your predictions for \'Revenue\' (in thousands) for 2023:\n') | |
r.sendline(' '.join(correct_value).encode()) | |
r.interactive() |
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