4

#include<iostream>
#include<cmath>
using namespace std;
int a(int s,int d,int f){
if(s<d)s=d;
if(s<f)s=f;
return s;
}
int main(){
int z,x,c;
cin>>z>>x>>c;
cout<<a(z,x,c);
return 0;
}