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A

def GCD(a,b):
    r=a%b
    while r:
        a=b
        b=r
        r=a%b
    return b
a=int(input())
b=int(input())
print(GCD(a,b))

B

感谢jtq大佬的教导

while True:
    try:
        import math
        s=input()
        if s=="done":
            break
        print(eval(s))
    except:
        break

C

d=int(input("Day: "))
if d<10:
    d=str("0"+str(d))
m=int(input("Month: "))
if m<10:
    m=str("0"+str(m))
y=input("Year: ")
print(f'Standard format: {y}-{m}-{d}')
print(f'New Zealand format: {d}/{m}/{y}')

D

def dg(s):
    ans=0
    for i in s:
        ans+=int(i)
    return ans
s=input("The number: ")
ans=0
while(len(s)>1):
    ans=dg(s)
    s=str(ans)
print(f'The digit total: {ans}')

E

递推

while True:
    try:
        a1=1
        a2=1
        a=0
        n=int(input())
        if n==1:
            print(1)
            break
        if n==2:
            print(1)
            break
        for i in range(3,n+1):
            a=a1+a2
            a1=a2
            a2=a
        print(a)
    except:
        break

递归

def dg(x,a=1,b=1):
    if x<=2:
        return a
    else:
        return dg(x-1,a+b,a)
n=int(input())
print(dg(n))

套公式

import math
def fibs(n):
    a=1/math.sqrt(5)*(((1+math.sqrt(5))/2)**n-((1-math.sqrt(5))/2))
    return int(a)
print(fibs(int(input())))