题解 | 记数问题

num1,num2 = input().split()
count = 0
list1 = []
for i in range(1,int(num1)+1):
    list1.append(i) 
# 把列表中的每个数字转换成字符串，然后用空字符串连接成一个整体字符串。比如12345678910    
sum = ''.join(map(str, list1))
for j in sum:
    if(j == num2):
        count+=1
print(count)