KVALIF_VGTU_A

#include <iostream>
using namespace std;
int main()
{
    int x, y, z, maxx = 0;
    cin >> x >> y >> z;
    if(x!=0 && x!=1){maxx=x/2;}
    else{maxx=-1;}
    if(y>=6 && maxx!=-1){if( (y/6)<maxx ){maxx=y/6;}}
    else{maxx=-1;}
    if(z>=1 && maxx!=-1){if( (z/1)<maxx ){maxx=z/1;}}
    else{maxx=-1;}

    if(maxx==-1){cout << "0";}
    else{cout << maxx;}
    return 0;
}