#include <iostream>
using namespace std;
int main(){
    long long x,y,z;
    cin>>x>>y>>z;;
    /*if(x%2== 0 && y%2==0 && z/2!=0){
        cout<<z<<endl;
    }else if(x/2== 0 && z/2==0 && y/2!=0){
        cout<<y<<endl;
    }else{
        cout<<z<<endl;
    }*/
    if(x-z<=y){
        cout<<y<<endl;
    }else if(y-z<=x){
        cout<<x<<endl;
    }else{
        cout<<z<<endl;
    }
}