#include <iostream>
#include <vector>
using namespace std;
vector <int> merge_sort(vector <int>& a, int x, int y){
    if (y-x<=1){
        return a;
    }
    int m=(x+y)/2;
    merge_sort (a, x, m);
    merge_sort (a, m, y);
    vector <int> merge(vector <int>& a, int x, int m, int y){
    vector <int> result(y-x);
    int i=x;
    int j=m;
    while (i<m && j<y){
        if (a[i]<=a[j]){
            result[i-x+j-m]=a[i];
            i++;
        }else{
            result[i-x+j-m]=a[j];
            j++;
        }
    }
    while (i<m){
        result[i-x+j-m]=a[i];
        i++;

    }while (j<y){
        result[i-x+j-m]=a[j];
        j++;
    }
    return result;
    }
    for (int i=0; i<y; i++){
        a[x+i]=result[i];
    }
    return a;
}
int main(){
    int n;
    cin>>n;
    int x=0;
    vector <int> a(n);
    for (int i=0; i<n; i++){
        cin>>a[i];
    }
    for (int i=0; i<n; i++){
        cout<<a[i];
    }

}