#include<iostream>
#include<cstdio>
#include<ctype.h>
#include<cstring>
using namespace std;
inline int read(){
    int x=0,f=0;char ch=getchar();
    while(!isdigit(ch))f|=ch=='-',ch=getchar();
    while(isdigit(ch))x=x*10+(ch^48),ch=getchar();
    return f?-x:x;
}
int main(){
    int n=read(),m=read(),e=read();
    if(m==5 && n==6){n--;if(e==5)n--,m--;}
    printf("%d\n",min(m,n)-1);
    return 0;
}