A,B,C = int(input()),int(input()),int(input())
N = 0
number = 0
result = []
for N in range(10**5):
    N = N + 1
    if A*N > B:
        number = A*N - B
    else:
        number = A*N
    if number == C:
        result.append(N)
if len(result) > 0:
    for i in result:
        print(i)
else:
    print(int(-1))