#include<iostream>
int A[4],n,m;
int main(){
	while(n++<10){
		std::cin>>A[3];
		m=3;
		while(m){
			if(A[m]>A[--m]){
				std::swap(A[m+1],A[m]);
			}
		}
	}
	std::cout<<A[2]<<"\n";
}