x = int(input())
y = input().split()
m = int(y[0])
n = int(y[1])
c = 0
for i in range(m, n + 1):
    q = i // 1000 % 10
    b = i // 100 % 10
    s = i // 10 % 10
    g = i // 1 % 10
    if q == x or b == x or s == x or g == x:
        c += 1
print(c)
/**************************************************************
	Problem: 1445
	User: admin
	Language: Python
	Result: Accepted
	Time:144 ms
	Memory:34480 kb
****************************************************************/