a, b, c = (int(i) for i in input().split())

sum = (a - 1) + b

over = int(c / sum)
ama = c % sum

if ama > a:
	ans = over * a + ama - 1
else:
	ans = over * a + ama

if sum >= c:
	if a - 1 >= c:
		print(c) 
	else:
		print(a)
else:
	print(ans)