#include<iostream>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a+b<=0){
        cout<<"0";
    }else{
        if(b+c<=a){
            cout<<"0";
        }else{
           if(a+c<=b){
               cout<<"0";
           }else{
               cout<<"1";
           } 
        }
    }
}