n, m, k = map(int, input().split())
cnt = 0
while n >= 0 and m >= 0 and n + m >= k:
n -= 2
m -= 1
cnt += 1
print(cnt - 1)
개발자를 꿈꿉니다.
n, m, k = map(int, input().split())
cnt = 0
while n >= 0 and m >= 0 and n + m >= k:
n -= 2
m -= 1
cnt += 1
print(cnt - 1)