python3全WA

denghuolanshan_1004 @ 2023-01-09 18:49:35

a=int(input())
for i in range(a):
    x=list(map(int,input().split()))
    b=x[0]
    c=0
    for j in range(1,x[0]+1):
        b*=j
    b=str(b)
    for j in range(0,len(b)):
        if b[j]==b[1]:
            c+=1
    print(c)

by Loser_Syx @ 2023-01-09 18:53:46

@denghuolanshanchu 直接普通乘法运算不行吗，你又不是C++，还要字符串做（换句话说，数位分离会吗）

by Loser_Syx @ 2023-01-09 18:54:45

@denghuolanshanchu 我的AC代码：

n = int(input())
i = 1
while i <= n:#不高兴写for了
    a, b = map(int, input().split())
    j = 1
    sum = 1
    while j <= a:
        sum *= j
        j += 1
    cnt = 0
    while sum != 0:
        if(sum % 10 == b):
            cnt += 1
        sum = sum // 10
    print(cnt)
    i += 1

by Terrible @ 2023-01-09 19:09:48

a=int(input())
for i in range(a):
    x=list(map(int,input().split()))
    b=x[0]
    x[1]=str(x[1])#改成str
    c=0
    for j in range(1,x[0]):#去掉+1
        b*=j
    b=str(b)
    for j in range(0,len(b)):
        if b[j]==x[1]:#改成x[1]
            c+=1
    print(c)

by Terrible @ 2023-01-09 19:11:52

import math
t=int(input())
for _ in range(t):
    a,b=map(int,input().split())
    print(str(math.factorial(a)).count(str(b)))

话说你不是在用Python吗？

by mazichen @ 2023-01-09 19:35:37

既然Python中有.count()干嘛不用呢

t = int(input())
for i in range(t):
    n,a = map(int,input().split())
    res = 1
    for j in range(1,n+1):
        res *= j
    print(str(res).count(str(a)))

验证码6674