zerojudge_intro
===
###### tags: `colde_garage_python_2019`
# How to start your first code on zerojudge
## the "hello world problem"
https://zerojudge.tw/ShowProblem?problemid=a001
### example code

import sys
for s in sys.stdin:
    print('hello, '+s)

## a042: 平面圓形切割
https://zerojudge.tw/ShowProblem?problemid=a042
### example code

import sys
for s in sys.stdin:
    num = int(s)
    print(num**2 - num + 2)

# try it yourself ^ ^
保證十行內可以解完
基礎題
https://zerojudge.tw/ShowProblem?problemid=a044
https://zerojudge.tw/ShowProblem?problemid=a111
## a111 template

import sys
for s in sys.stdin:
    # trun s to int
    if s == 0:
        break
    # print answer

挑戰題 9/30更新題示
https://zerojudge.tw/ShowProblem?problemid=b757