a,b,c=map(int,input().split())
t=b+a-1
temp=c//t
if temp==0:
    if a-1<c:
        print(a)
    else:
        print(c)
else:
    mod=c%t
    if mod>=a:
        print((temp+1)*a)
    else:
        print(temp*a+mod)