#include<stdio.h>
void insertion_sort(int arr[],int n){
    for(int i=1;i<n;i++){
        int key=arr[i];
        int j=i-1;
        while(j>=0 && key<arr[j]){
            arr[j+1]=arr[j];
            j--;
        }
        arr[j+1]=key;
    }
}
int main()
{
    int n;
    if(scanf("%d",&n)!=1||n<0){
        printf("Invalid input\n");
        return 0;
    }
    int scores[n];
    for(int i=0;i<n;i++){
        if(scanf("%d",&scores[i])!=1){
            printf("Invalid input\n");
            retun 0;
        }
    }
    insertion_sort(scores,n);
    for(int i=0;i<n;i++){
        printf("%d",scores[i]);
    }
    printf('\n');
    return 0;
}