#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    if(n < 0){
        printf("Invalid input");
        return 0;
    }
    int arr[n];
    for(int i = 0;i < n;i++){
        scanf("%d", &arr[i]);
    }
    for (int i = 0;i < n;i++){
        for(int j = i + 1 < n; j++){
        if(arr[i] > arr[j]){
            int temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }
}
for(in i = 0; i < n; i++){
    printf("%d", arr[i]);
}
return 0;
}