#include<bits/stdc++.h>
using namespace std;
int main()
{
ios_base :: sync_with_stdio(false);
cin.tie(NULL);
int n;
cin >> n;
if(1 <= n && n <= 50){
cout << "100" << endl;
}
else if(51 <= n && n <= 100){
cout << "50" << endl;
}
else {
cout << "0" << endl;
}
return 0;
}
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