#include<bits/stdc++.h>
#include <iostream>

using namespace std;

int main()
{
    int x;
    vector<int> v;
    while(cin>>x){
        v.push_back(x);
    }
    sort(v.begin(),v.end(),greater<int>());
    cout<<v[2]<<endl;
    
    return 0;
}