题解 | 记数问题

n, m = map(int, input().split())
count = 0
m_str = str(m)

for i in range(1, n + 1):
    num_str = str(i)
    occurrences = num_str.count(m_str)
    if occurrences > 0:
        count += occurrences

print(count)
'''
错在没有考虑22，33，44这种数字
n, m = map(int, input().split())
count = 0
c=[]
for i in range(1, n + 1):
    if str(m) in str(i):  # 把数字转为字符串后检查包含关系
        count += 1
        c.append(i)

print(count)
print(c)
'''