#include <iostream>
using namespace std;

int main() {
    int age, max_age = 0;
    for (int i = 0; i < 5; i++) {
        cin >> age;
        if (age > max_age) {
            max_age = age;
        }
    }
    cout << max_age << endl;
    return 0;
}
/**************************************************************
	Problem: 1736
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/