/*************
the author:
shimutski_zoro
************ */
#include <bits/stdc++.h>
using namespace std;
#define yon(x) cout<<((x)?"YES":"NO");
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define ff first
#define ss second
#define em emplace_back
#define rep(i,j,k) for(int i=j;i<=k;i++)
#define per(i,j,k) for(int i=k;i>=j;i--)
#define forp(x,y,a) for(auto &[x,y]:(a))
typedef long long ll;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
typedef vector<pll> vpl;
typedef vector<vl> vvl;
typedef vector<vpl> vvpl;
typedef vector<string> vs;
typedef deque<ll> dl;
const int mod=1e9+7;
ll inf =1e18+1;
const int M=1e6;
const int N=1e3+1;
const ll dx[]={1,0,-1,0},dy[]={0,1,0,-1};
void solve(){
ll n,m,d;
cin>>n>>d>>m;
vl a(m);
rep(i,0,m-1)cin>>a[i];
vl idx(m);
iota(all(idx),0LL);
sort(all(idx),[&](ll i ,ll j){return a[i]<a[j];});
sort(all(a));
function<pair<bool,vvl>(ll)>check=[&](ll r)->pair<bool,vvl>{
vvl tmp=vvl (n+1);
ll cnt=0;
rep(i,1,n){
rep(j,1,r){
if(cnt==m)return {1,tmp};
if(a[cnt]>i)
break;
if(a[cnt]+d>=i){
//cout<<cnt<<" "<<a[cnt]<<" "<<idx[cnt]<<" "<<i<<endl;
tmp[i-1].em(idx[cnt++]+1);
}else return {0,tmp};
if(cnt==m)return {1,tmp};
}
}
return {0,tmp};
};
// 1 1 2 2 2 3 3 4 4 5 6 6
//0 4 1 3 8
vvl v;
ll lo=1,hi=m;
ll ans=m;
while(lo<=hi){
ll mid= lo + (hi-lo)/2;
auto[ x,tmp]=check(mid);
if(x){
hi=mid-1;
ans=mid;
v=tmp;
}else{
lo=mid+1;
}
}
cout<<ans<<endl;
//vvl v(n+1);
rep(i,0,n-1){
if(v[i].size())
for(auto it:v[i]){
cout<<it<<" ";
}
cout<<0<<"\n";
}
}
signed main()
{
ios_base::sync_with_stdio(NULL);
cin.tie(nullptr);
cout.tie(nullptr);
#ifdef Usaco
string f="herding";
freopen((f+".in").c_str(),"r",stdin);
freopen((f+".out").c_str(),"w",stdout);
#endif
int t = 1;
//cin >> t;
while (t--)
{
solve();
// if(t>0)
//cout<<endl;
}
}
/*
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
40 ms |
5392 KB |
Output is correct |
2 |
Correct |
39 ms |
5380 KB |
Output is correct |
3 |
Correct |
37 ms |
5392 KB |
Output is correct |
4 |
Correct |
40 ms |
5408 KB |
Output is correct |
5 |
Correct |
41 ms |
5392 KB |
Output is correct |
6 |
Correct |
42 ms |
5392 KB |
Output is correct |
7 |
Correct |
38 ms |
5404 KB |
Output is correct |
8 |
Correct |
37 ms |
5408 KB |
Output is correct |
9 |
Correct |
82 ms |
12048 KB |
Output is correct |
10 |
Correct |
82 ms |
12092 KB |
Output is correct |
11 |
Correct |
35 ms |
4856 KB |
Output is correct |
12 |
Correct |
93 ms |
9072 KB |
Output is correct |
13 |
Correct |
117 ms |
14456 KB |
Output is correct |
14 |
Correct |
187 ms |
20028 KB |
Output is correct |
15 |
Correct |
210 ms |
21708 KB |
Output is correct |
16 |
Correct |
244 ms |
26756 KB |
Output is correct |
17 |
Runtime error |
310 ms |
34956 KB |
Memory limit exceeded |
18 |
Runtime error |
373 ms |
35828 KB |
Memory limit exceeded |
19 |
Runtime error |
393 ms |
45412 KB |
Memory limit exceeded |
20 |
Runtime error |
320 ms |
34832 KB |
Memory limit exceeded |