#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
int main() {
int a, b, c, d, e, m;
scanf("%d%d%d%d%d", &a, &b, &c, &d, &e);
c/=2, d/=7, e/=4;
m=min(a, b);
m=min(m, c);
m=min(m, d);
m=min(m, e);
printf("%d", m);
return 0;
}
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