A,B,C = map(int,input().split())

res = []
k = B//A
for n in range(1,k+1):
    if n*A-B <= 0 and C == n*A:
        res.append(n)
        break
for n in range(k+1,pow(10,5)+1):
    if n*A-B > 0 and C == n*A-B:
        res.append(n)
        break
res.sort()
if not res: print(-1)
else:
    for r in res:
        print(r)