Python 语言学习——做题记录2.1

首先练习序列的操作。

P1. 洛谷B2113输出亲朋字符串

x=input()#eval只能取出数值，而这里操作对象为字符串
x=str(x)
ansd=list(x)
for i in range(0,len(x)-1):#len(s)取长度
    ansd[i]=chr(ord(x[i])+ord(x[i+1]))#ord()将字符变为对应编码
pass
ansd[len(x)-1]=chr(ord(x[len(x)-1])+ord(x[0]))

for i in ansd:
    print(i,end="")

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P2. 洛谷P1428小鱼比可爱

import sys
n=input()#得到str类型
n=int(n)
inputs=sys.stdin.readline()#readline()得到的原汁原味大字符串,包含空格,相当于把整行看作字符串
elements=inputs.split()#根据inputs中空格split出各个元素并生成列表
a=[None for i in range(0,n)]#空列表的创建
for i in range(0,n):
    a[i]=int(elements[i])
pass

ans=[0 for i in range(0,n)]
dex=0
while(dex<n):
    count=0
    for i in range(0,dex+1):
        if(a[i]<a[dex]):
            count=count+1
        pass
    pass
    print(count,end=" ")
    dex=dex+1
pass

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P3. 洛谷p1765手机

import sys
prime=sys.stdin.readline()
a=prime.split()

count=0
spacenums=len(a)-1
for i in range(0,len(a)):
    for j in range(0,len(a[i])):
        match(a[i][j]):#注意写法
            case 'a'|'d'|'g'|'j'|'m'|'p'|'t'|'w':#match中or的写法
                count=count+1
            case 'b'|'e'|'h'|'k'|'n'|'q'|'u'|'x':
                count=count+2
            case 'c'|'f'|'i'|'l'|'o'|'r'|'v'|'y':
                count=count+3
            case 's'|'z':
                count=count+4
            case _:
                count=count
    pass
pass
print(count+spacenums)