int main()
{
    int f[13]={0,31,28,31,30,31,30,31,31,30,31,30,31},i,j,day;
    cin>>day;
    day--;
    for( i=1 ; i<=12 ; i++ )
     for( j=1 ; j<=f[i] ; j++ )
     {
       day++;
       if(day>7)day=1;
       if(j==13&&day==5)cout<<i<<endl;
     }
}
