#include <bits/stdc++.h>;
using namespace std;
int main(){
	int a[5]={0};
	int s,b,c,d,e;
	cin>>s>>b>>c>>d>>e;
	a[0]=s;
	a[1]=b;
	a[2]=c;
	a[3]=d;
	a[4]=e;
	sort(a,a+5);
	cout<<a[4]<<endl;
}


/**************************************************************
	Problem: 1736
	User: admin
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2076 kb
****************************************************************/