from collections import defaultdict,deque
import sys,heapq,bisect,math,itertools,string,queue,copy,time
sys.setrecursionlimit(10**8)
INF = float('inf')
mod = 10**9+7
eps = 10**-7
def inp(): return int(input())
def inpl(): return list(map(int, input().split()))
def inpl_str(): return list(input().split())

X,Y,Z = inpl()

if Z < X:
    print(Z)
elif X <= Z < Y:
    print(Z-1)
else:
    print(Z-2)