INF = 10 ** 9
import sys
sys.setrecursionlimit(100000000)
dy = (-1,0,1,0)
dx = (0,1,0,-1)
from  heapq import heappop,heapify,heappush
from bisect import bisect_left

def main():
    x,y,z = map(int,input().split())
    if z < x:
        print(z)
    elif z < y:
        print(z - 1)
    else:
        print(z - 2)
if __name__ == '__main__':
    main()