#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define pb push_back
#define sz(v) (ll)(v.size())
#define f first
#define s second
#define pii pair<int, int>
#define pll pair<ll, ll>
using namespace std;
using namespace __gnu_pbds;
typedef tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
void solve()
{
ll n, d, m, i, j;
cin >> n >> d >> m;
ll v[m+5];
for(i = 1; i <= m; i++)
cin >> v[i];
vector<pll>vect;
for(i = 1; i <= m; i++)
vect.pb({v[i], i});
sort(all(vect));
ll l = 1, r = m, bst = m+1;
while(l <= r)
{
ll mid = (l + r) / 2;
ll day = 1;
ll f = mid;
for(i = 0; i < sz(vect);)
{
if(day > n)
break;
if(!f)
{
day++;
f = mid;
}
if(vect[i].f <= day && day <= vect[i].f + d && f)
f--, i++;
else
{
f = mid;
day++;
}
}
if(i < sz(vect))
l = mid + 1;
else
{
bst = mid;
r = mid - 1;
}
}
cout << bst << "\n";
ll day = 1;
ll f = bst;
for(i = 0; i < sz(vect); )
{
if(!f)
{
f = bst;
cout << "0\n";
day++;
}
if(vect[i].f <= day && day <= vect[i].f + d && f)
cout << vect[i].s << ' ', i++, f--;
else
{
f = bst;
cout << "0\n";
day++;
}
}
for(i = day; i <= n; i++)
cout << "0\n";
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
ll tests = 1;
//cin >> tests;
while(tests--)
{
solve();
}
}
