#!/usr/bin/env python3
 
import os, sys
from operator import add
from time import sleep
from random import randint
 
message = {True: '正', False: '誤'}
 
# Environment
# ゲームに使う情報は例えばこうやって構造体的にまとめておく
# これがゲームの現時点での「評価」として返り値になる
class Env(object):
    def __init__(self, flag, lst):
        self.flag = flag
        self.lst = lst
 
# Read
# 入力機構
# 入力以外の事柄はやってはいけない
def read(env):
    if len(env.lst) == 15:
        return int(input('>>>'))
    else:
        return ""
 
# Eval
# ゲームの評価機構
# いわばゲームエンジン
def engine(x, env):
    return Env(x == sum(env.lst) if len(env.lst) == 15 else env.flag,
               [] if len(env.lst) == 15 else [randint(99, 999)] + env.lst)
 
# Print
# 出力機構
# 出力以外の事柄はやってはいけない
def display(env):
    if env.flag != None:
        print(message[env.flag])
    else:
        print(env.lst[0])
        sleep(3)
        os.system('clear') # MS-DOS/Windows では clear の代わりに cls コマンド
    return env
 
# REPL(Read-Eval-Print Loop)
# ゲームの本体は Read、Eval、Print を組み合わせてルーピングさせて作る 
if __name__ == '__main__':
    env = Env(None, [])
    while(True):
        try:
            env = display(engine(read(env), env))
        except ValueError:
            env
        if isinstance(env.flag, bool):
            sys.exit()
 

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