#include <iostream>
using namespace std;
int main()
{
int n, s1=0, s2=0;
cin >> n;
if (n>9)
s1=s1+n%10;
n=n/10;
s2=s2+n%10;
}
if (s1==s2) cout << 1;
else cout << 0;
return 0;
