#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int y,c,p;
cin>>y>>c>>p;
cout << ((y < c / 2 ? y : c / 2) < p ? (y < c / 2 ? y : c / 2) : p);
return 0;
}
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