acm python

1 diamond 

  *

 **

***

 **

  *

n = 5
_max = 2 * n - 1
a = [("*"*e).center(_max," ")for e in [2*i - 1 if i<=n else 4*n-2*i-1 for i in range(1,_max+1)]]
for each in a:
    print each

---

2 prime in 100

for prime_num in range(2,101):
　　for factor in range(2,prime_num/2):
　　　　if prime_num%factor ==0:break
　　else:
　　　　print prime_num

---

3 abc -> bcd

#!/usr/bin/env python
#coding:utf-8

import sys

t = int(raw_input())
cases = 0

while t>0:
    t = t-1
    cases = cases+1
    line = raw_input()
    res = []
    for ch in line:
        if ch=='Z':
            res.append('A')
        else:
            res.append(chr(ord(ch)+1))
    print "String #%d" % cases
    for ch in res:
        sys.stdout.write("%c" % ch)
    print '
'

var