2022年python国际化课程上机考试二题解

问题 A: Encode

用ord和chr函数会很方便，特判z

n=input()
a=[]
for x in n:
    if(x=='z'):
        a.append(100)
    else:
        a.append(ord(x)+4)
for i in a:
    print(chr(i),end='')

问题 B: Temperature conversion

n=float(input())
print("c="+"%.2f"%(5*(n-32)/9))

问题 C: Integer

反向循环或reserve

s=input()
print(len(s))
 
for i in s:
    print(i,end=" ")
print("")
for i in range(len(s)-1,-1,-1):
    print(s[i],end="")

问题 D: Profits

大模拟，最后写的，能少罚时

a=int(input())
m=0
#print(100000*0.1) 
#print(100000*0.075)
#print(200000*0.05)
 
if a<100000:
    m=a*0.1
if a>100000 and a<=200000:
    m=10000+(a-100000)*0.075
if a>200000 and a<=400000:
    m=17500+(a-200000)*0.05
if a>400000 and a<=600000:
    m=27500+(a-400000)*0.03
if a>600000 and a<=1000000:
    m=33500+(a-600000)*0.015
if a>1000000:
    m=39500+(a-1000000)*0.01
 
m=int(m)
print(m)

问题 E: Three sum

a,b,c=map(int,input().split())
num=0
for i in range(1,a+1):
    num+=i
for i in range(1,b+1):
    num+=i**2
for i in range(1,c+1):
    num+=1/i
print("%.2f"%num)

问题 F: Daffodil number

这四个数背都背下来了 QAQ

print("153")
print("370")
print("371")
print("407")

问题 G: Perfect number

n=int(input())
for i in range(2,n):
    lis=[]
    sum=0
    for j in range(1,i//2+1):
        if i%j==0:
            lis.append(j)
            sum+=j
    if sum==i:
        print(i,end="")
        print(" its factors are ",end="")
        for t in lis:
            print(t,end=" ")
        print("")

问题 H: Sequence summation

n=int(input())
sum=0
a=2
b=1
for i in range(0,n):
    sum+=a/b
    tmp=a
    a=a+b
    b=tmp
print("%.2f"%sum)

问题 I: Free fall

每弹跳一次减半

问总路径和最后高度

m,n=map(int,input().split())
sum=0
for i in range(0,n):
    sum+=m+m/2
    m/=2
sum=sum-m
print("%.2f %.2f"%(m,sum))

问题 J: Prime number

筛质数

n=int(input())
for i in range(2,n):
    fl=0
    for j in range(2,i//2+1):
        if i%j==0:
            fl=1
            break
    if fl==0:
        print(i)