#include <bits/stdc++.h>
using namespace std;
int main() {
	int a, b, c;
	cin >> a >> b >> c;
	if(a + b > c || a + c > b || b + c > a)
		cout << "1";
	else
		cout << "0";
	return 0;
}

大佬纠正一下错误，谢谢φ(*￣0￣)