MathRandom

import socket

MAXBUF = 4096
Service = ('cj2k17.ctf.idsirtii.or.id', 3939)

if __name__ == '__main__':
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect(Service)

    for i in range(0, 25):
        data = b''

        while True:
            chunk = client.recv(MAXBUF)
            data += chunk
            if len(chunk) < MAXBUF:
                break

        decoded = data.decode('utf-8')
        print decoded.replace('\n', '')

        for i in decoded.split('\n'):
            if 'No:' in i:
                spl = i.split()
                j = spl[2] + ' ' + spl[3] + ' ' + spl[4]
                result = eval(j)

                data = str(result).encode('utf-8') + b'\n'
                client.send(data)