import sys
input = sys.stdin.readline

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

ANS=[]

if (C+B)%A==0:
    ANS.append((C+B)//A)
if C%A==0:
    ANS.append(C//A)


LANS=[]

for a in ANS:
    x=a*A
    if x-B>0:
        x-=B

    if x==C:
        LANS.append(a)

if LANS==[]:
    print(-1)
else:
    LANS.sort()
    for a in LANS:
        print(a)