tsk 5

cnt = 0
for i in range(1000):
    n = 1
    s = i
    while s > n:
        s -= 15
        n *= 5
    if n == 125:
        cnt += 1
print(cnt)
# x > 1
# x - 15 > 5
#x - 15 - 15 > 25
#x - 15 - 15 - 15 <= 125
#min x == 25 + 1 + 15 + 15 == 56
#max x == 125 + 15*3 == 170
#cnt == 170 - 56 + 1 == 115