洛谷题单python解【入门5】字符串

• P5733 【深基6.例1】自动修正

s=input()
print(s.upper())

• P1914 小书童——凯撒密码

n=int(input())
s=list(input())
l=len(s)
for i in range(l):
    s[i]=chr((ord((s[i]))-ord('a')+n)%26+ord('a'))
print(''.join(s))

• P1125 [NOIP2008 提高组] 笨小猴

from math import sqrt
def is_prime(n):
    if n<=1:
        return False
    for i in range(2,int(sqrt(n))+1):
        if n%i==0:
            return False
    return True
word=input()
frequency={}
for letter in word:
    if letter in frequency:
        frequency[letter]+=1
    else:
        frequency[letter]=1
        
if not frequency:
    print("Lucky Word")
    print(0)
else:
    maxn=max(frequency.values())
    minn=min(frequency.values())
    diff=maxn-minn
    if is_prime(diff)==True:
        print("Lucky Word")
        print(diff) 
    else:
        print("No Answer")
        print(0)