RECEPT

#include <bits/stdc++.h>
#define ll long long
using namespace std;

const int N = 1e5 + 5;

int n, m;
int b[N];
vector<int> ans;

int main()
{
    //freopen("in.txt", "r", stdin);
    freopen("RECEPT.inp", "r", stdin);
    freopen("RECEPT.out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    cin >> n >> m;
    for(int i = 1; i <= m; ++i)
        cin >> b[i];

    for(int i = 1; i <= m; ++i) {
        for(int j = 1; j <= b[i] - b[i-1]; ++j)
            cout << i << ' ';
    }

    return 0;
}