#include <iostream>
using namespace std;
int main() {
int tiv1,tiv2,tiv3;
cin>>tiv1>>tiv2>>tiv3;
if(tiv2+tiv3>tiv1 && tiv1+tiv3>tiv2 && tiv1+tiv2>tiv3)
cout<<1;
else cout<<0;
return 0;
}
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