a, b, c = map(int,input().split())

p = c//(a-1+b)
#print('p',p)
now = ((a-1+b)*p)
#print('now',now)
if now == c:
    print(a*p)
else:
    if c-now <= a-1:
        print(a*p+c-now)
    else:
        print(a*p+a)