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