#include<stdio.h>

int main(void){
    
    int X,Y,Z;
    
    scanf("%d%d%d",&X,&Y,&Z);
    
    if(Z<X) printf("%d\n",Z);
    else if(X<=Z&&Z<Y) printf("%d\n",Z-1);
    else printf("%d\n",Z-2);
    
    return 0;
    
}