sp = ['10 11', '-5 -10', '13 1', '8 -5', '-5 -9', '-10 4', '-11 -2', '12 1', '17 1']
mx = 0
for A in range(100):
yes = 0
no = 0
for i in sp:
s, k = i.split()
if int(s) > A or int(k) > 3:
yes += 1
else:
no += 1
if no == 4 and A > mx:
mx = A
print(mx)
c3AgPSBbJzEwIDExJywgJy01IC0xMCcsICcxMyAxJywgJzggLTUnLCAnLTUgLTknLCAnLTEwIDQnLCAnLTExIC0yJywgJzEyIDEnLCAnMTcgMSddCm14ID0gMApmb3IgQSBpbiByYW5nZSgxMDApOgogICAgeWVzID0gMAogICAgbm8gPSAwCiAgICBmb3IgaSBpbiBzcDoKICAgICAgICBzLCBrID0gaS5zcGxpdCgpCiAgICAgICAgaWYgaW50KHMpID4gQSBvciBpbnQoaykgPiAzOgogICAgICAgICAgICB5ZXMgKz0gMQogICAgICAgIGVsc2U6CiAgICAgICAgICAgIG5vICs9IDEKICAgIGlmIG5vID09IDQgYW5kIEEgPiBteDoKICAgICAgICBteCA9IEEKCnByaW50KG14KQ==