#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
string int_to_string(int x) {
    string s = "";
    while(x > 0) {
        s += (x % 10) + '0';
        x /= 10;
    }
    reverse(s.begin(), s.end());
    return s;
}
int main() {
    int n;
    cin >> n;
    string s = "";
    int vkupna_golemina = 0;
    int cnt = 1;
    while(vkupna_golemina < n) {
        s += int_to_string(cnt);
        vkupna_golemina += (int) s.size();
        cnt++;
    }
    int region = vkupna_golemina - (int) s.size();
//    cout << vkupna_golemina <<" " << (int) s.size() << endl;
    int idx = 0;
    while(region < n) {
        region++;
        idx++;
    }
    cout << s[idx - 1] << endl;
    return 0;
}
// 1 12 123 1234 12345