import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

a,b,c = na()
ans = []
if (c + b) % a == 0:
    ans.append((c+b)//a)
if c <= b and c % a == 0:
    ans.append(c//a)
if len(ans) == 0:
    print(-1)
else:
    for i in sorted(ans):
        print(i)