PTA python第五周题解

7-1 统计数字 (10 分)

n = eval(input())
for i in range(n):
    str = input()
    sum = 0
    for i in str:
        if i.isdigit():
            sum += 1
    print(sum)

7-2 sdut-求满足条件的斐波那契数 (10 分)

n = eval(input())
f = [0, 1, 1]
for i in range(3, 1024):
    f.append(f[i-1]+f[i-2])
    if f[i] > n:
        print(f[i])
        break

7-3 平均值 (10 分)

n = eval(input())
for i in range(n):
    str = list(map(int, input().split()))
    print(sum(str)/len(str))

7-4 最小回文数 (10 分)

n = eval(input())
def isPalindrome(num):
    return str(num) == str(num)[::-1]
for j in range(n):
    num = eval(input())
    for i in range(num+1, 10**100+1):
        if isPalindrome(i):
            print(i)
            break

7-5 计算 1+2+3+…+m。 (10 分)

try:
    while True:
        n = eval(input())
        print("sum={}".format(sum(i for i in range(n+1))))
except EOFError:
    pass

7-6 sdut-循环-乘法运算 (10 分)

n = eval(input())
for i in range(1, n+1):
    print("{}*{}={}".format(i,n,i*n))

7-7 sdut-入门-7 A+B for Input-Output Practice (VII) (10 分)

try:
    while True:
        a, b = map(int, input().split())
        print(a+b)
        print()
except EOFError:
    pass

7-8 三七二十一 (10 分)

n = eval(input())
for i in range(n):
    a, b = map(int, input().split())
    k = 0
    for j in range(a, b+1):
        if j%7==1 and j%3==2 and k==0:
            print(j,end="")
            k = 1
        elif j%7==1 and j%3==2 and k!=0:
            print(" {}".format(j),end="")
    if k != 0:
        print()
    if k == 0:
        print("none")

7-9 菱形 (10 分)

try:
    while True:
        n = eval(input())
        for i in range(1, n+1):
            print(" "*(n-i),end="")
            print("*"*(2*i-1))
        for i in range(n-1, 0, -1):
            print(" "*(n-i),end="")
            print("*"*(2*i-1))
except EOFError:
    pass

7-10 删除列表中的重复值（高教社，《Python编程基础及应用》习题4-8） (5 分)

s = eval(input())
a = s[::-1]
dp = []
for i in range(len(a)):
    if a[i] in dp:
        pass
    else:
        dp.append(a[i])
print(dp[::-1])