#include<bits/stdc++.h>
using namespace std;
int  main() {
	int n;
	int m1;
	int m[2000005];
	cin >> n;
    cin >> m1;
	for (int i = 1; i <= m1; i++) {
		cin >> m[i];
	}
	for (int i = 1; i <= m1; i++) {
		if (m[i] > m[i + 1]){
			int b = m[i];
			m[i] = m[i + 1];
			m[i + 1] = m[i];
		  
		}
		else if (m[i] == m[i + 1]) {
			m[i] = m[i];
			m[i + 1] = m[i + 1];

		}
	}
	for (int i = 1; i <= m1; i++) {
		cout << m[i];

	}
	return 0;
}