7

#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    float x,mini,k;
    int a[50],min_i;
    cin>>x;
    ifstream fin("bac.txt");
    int i=0;
    fin>>a[i];
    mini=a[i]-x;
    min_i=i;
    if(mini<0)
        mini=-mini;
    while(fin.eof()==0)
    {
        i++;
        fin>>a[i];
        k=a[i]-x;
        if(k<0)
            k=-k;
        if(mini>k)
        {
            min_i=i;
            mini=k;
        }
    }
    cout<<a[min_i];
    return 0;
}