#include <bits/stdc++.h>   using namespace std;   int main() {     int i, n, a, j, b, m, s = 0, t = 0;     int x[105] = {0};     cin >> n >> m;     for (i = 1; i <= m; ++i) {       cin >> a;       for (j = a; j <= n; ++j) {         if (x[j] != 0) break;         x[j] = a;       }     }     for (i = 1; i <= n; ++i) cout << x[i] <<    ;     return 0;   }   