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