n = input().split()
x = int(n[0])
a = int(n[1])
b = int(n[2])
c = 0
for i in range(1, x // a + 1):
    for j in range(1, x // b + 1):
        if a * i + b * j == x:
            c += 1
print(c)

/**************************************************************
	Problem: 1016
	User: admin
	Language: Python
	Result: Accepted
	Time:239 ms
	Memory:34480 kb
****************************************************************/