#include <bits/stdc++.h> #define int long long using namespace std; signed main() { ios_base::sync_with_stdio(false); cin.tie(0); //freopen("schedule.in","r",stdin); int n,d,m; cin>>n>>d>>m; vector<pair<int,int>> jobs(m); for (int i=0;i<m;i++) { cin>>jobs[i].first; jobs[i].second = i+1; } sort(jobs.begin(),jobs.end()); int lo=1,hi=m; auto test=[&](int x) { int pt=0,day=0; while (pt<m) { day++; if ((jobs[pt].first-d)>day) return false; int had=0; while (pt<m && had<x) { if (jobs[pt].first>day) break; pt++; had++; } } return (day<=n); } ; while (lo<hi) { int mid=lo+(hi-lo)/2; if (test(mid)) hi = mid; else lo = mid+1; } cout<<lo<<"\n"; int pt=0,day=0; while (pt<m) { day++; int had=0; while (pt<m && had<lo) { if (jobs[pt].first>day) break; cout<<jobs[pt].second<<" "; pt++; had++; } cout<<0<<"\n"; } for (int i=day;i<n;i++) cout<<0<<"\n"; return 0; } // if you get WA, go and read the question carefully again // Then read the code for mixed variables, mistype, not considering a condition, etc.