This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,x,n) for(int i=x;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3HspL4A ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vec(int);
void print(){cout<<"\n";}
template<class T,class...E>
void print(const T&v,const E&...u){cout<<v<<' ',print(u...);}
// e
signed main(){
_3HspL4A;
int n;
cin>>n;
vi a(n);
rep(i,n){
cin>>a[i];
}
set<int> st;
for(auto x:a){
if(!sz(st)){
st.insert(x);
}else{
auto it=st.lower_bound(x);
if(it!=st.end()){
st.erase(it);
}
st.insert(x);
}
}
int len=sz(st);
vi usd(n);
vec(vi) pns;
while(1){
int n=sz(a),pok=0;
vi dp(n);
for(int i=0;i<n;i++){
if(usd[i]) continue;
dp[i]=1;
for(int j=0;j<i;j++){
if(usd[j]) continue;
if(a[i]>a[j]){
dp[i]=max(dp[i],dp[j]+1);
}
}
if(dp[i]==len){
pok=1;
pns.pb({});
int now=len,pj=i;
while(1){
int nj=-1,v=-1;
for(int j=i;j>=0;j--){
if(usd[j]) continue;
if(dp[j]==now and a[pj]>=a[j]){
if(a[j]>v){
v=a[j];
nj=j;
}
}
}
pns.back().pb(nj);
pj=nj;
now--;
if(!now) break;
}
for(auto ids:pns.back()){
usd[ids]=1;
}
break;
}
}
if(!pok) break;
}
print(sz(pns),len);
for(auto ids:pns){
reverse(ids.begin(),ids.end());
for(auto v:ids) cout<<v+1<<" ";
print();
}
//
return 0;
}
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