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Submission #632884

# Submission time Handle Problem Language Result Execution time Memory
632884 2022-08-21T05:53:49 Z MohammadAghil LIS (INOI20_lis) C++17
20 / 100
 4000 ms 6912 KB 
      #include <bits/stdc++.h>
  #pragma GCC optimize ("Ofast,unroll-loops")
#pragma GCC target ("avx2")
    using namespace std;
  typedef long long ll;
   typedef pair<int, int> pp;
    #define er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
      #define per(i,r,l) for(int i = (r); i >= (l); i--)
        #define rep(i,l,r) for(int i = (l); i < (r); i++)
           #define all(x) begin(x), end(x)
              #define sz(x) (int)(x).size()
                  #define pb push_back
                      #define ss second
                           #define ff first
                                   void err(istringstream *iss){}template<typename T,typename ...Args> void err(istringstream *iss,const T &_val, const Args&...args){string _name;*iss>>_name;if(_name.back()==',')_name.pop_back();cerr<<_name<<" = "<<_val<<", ",err(iss,args...);}
void IOS(){
     cin.tie(0) -> sync_with_stdio(0);
     // #ifndef ONLINE_JUDGE
     //      freopen("in.txt", "r", stdin);
     //      freopen("out.txt", "w", stdout);
     // #endif
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 1e6 + 5, sq = 2000, lg = 20, inf = ll(1e18) + 5;
ll pw(ll a,ll b,ll md=mod){if(!b)return 1;ll k=pw(a,b>>1ll);return k*k%md*(b&1ll?a:1)%md;}

int fen[maxn], n, pos[maxn], val[maxn], dp[maxn], tmp[maxn];
set<int> val_pos[sq], place[sq]; 

int main(){ IOS();
     cin >> n;
     rep(i,1,n+1){
          fen[i] = i&-i;
     }
     map<int, int> cmp;
     rep(i,0,n){
          cin >> pos[i] >> tmp[i];
          cmp[tmp[i]] = 0;
     }
     int id = 0;
     for(auto&c: cmp) c.ss = id++;
     vector<bool> is(n + 1); 
     per(i,n-1,0) {
          int ps = 0, cr = pos[i];
          per(i,lg-1,0){
               if((ps|(1<<i)) < n && fen[ps|(1<<i)] < cr){
                    ps |= 1<<i;
                    cr -= fen[ps];
               }
          }
          ps++;
          assert(!is[ps]);
          is[ps] = true;
          // er(nw);
          val[ps] = cmp[tmp[i]];
          pos[i] = ps;
          for(; ps < n + 1; ps += ps&-ps) fen[ps]--;
     }
     // rep(i,0,n) er(pos[i], val[i]);
     int ans = 1;
     rep(i,0,n){
          int p = pos[i], v = val[pos[i]];
          dp[p] = 1;
          rep(j,0,v){
               auto it = lower_bound(all(val_pos[j]), p);
               if(it != begin(val_pos[j])){
                    dp[p] = max(dp[p], dp[*prev(it)] + 1);
                    // er(i, j);
               }
          }
          // er(i, dp[p]);
          ans = max(ans, dp[p]);
          place[dp[p]].insert(p);
          val_pos[v].insert(p);


          // auto bg = place[dp[p]].upper_bound(p), en = bg; 
          // for(; en != end(place[dp[pos[i]]]) && val[*en] > v; en++) dp[*en]++, ans = max(ans, dp[p] + 1), er(i, *en, val[*en], v);

          // place[dp[p] + 1].insert(bg, en);
          // place[dp[p]].erase(bg, en);

          // rep(i,1,5){
          //      cerr << i << ":" << endl;
          //      for(int c: place[i]) cerr << c << ' ';
          //      cerr << endl;
          // }
          // cerr << "_____" << endl;

          vector<int> stk{p};
          stk.reserve(100);

          while(sz(stk)){
               int r = stk.back(); stk.pop_back();
               auto bg = place[dp[r]].lower_bound(r);
               if(bg == end(place[dp[r]]) || *bg - r) continue;
               bg++;
               auto en = bg;
               for(; en != end(place[dp[r]]) && val[*en] > val[r];){
                    dp[*en]++;
                    assert(dp[*en] <= *en);
                    ans = max(ans, dp[r] + 1);
                    stk.pb(*en);
                    place[dp[r] + 1].insert(*en);
                    en++;
                    place[dp[r]].erase(prev(en));
               }
          }

          cout << ans << '\n';
     }
     return 0-0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 21 ms 756 KB Output is correct
4 Correct 14 ms 732 KB Output is correct
5 Correct 14 ms 724 KB Output is correct
6 Correct 17 ms 724 KB Output is correct
7 Correct 23 ms 732 KB Output is correct
8 Correct 18 ms 788 KB Output is correct
9 Correct 18 ms 704 KB Output is correct
10 Correct 17 ms 724 KB Output is correct
11 Correct 23 ms 788 KB Output is correct
12 Correct 21 ms 724 KB Output is correct
13 Correct 22 ms 776 KB Output is correct
14 Correct 21 ms 724 KB Output is correct
15 Correct 19 ms 752 KB Output is correct
16 Correct 21 ms 688 KB Output is correct
17 Correct 20 ms 776 KB Output is correct
18 Correct 20 ms 752 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 21 ms 756 KB Output is correct
4 Correct 14 ms 732 KB Output is correct
5 Correct 14 ms 724 KB Output is correct
6 Correct 17 ms 724 KB Output is correct
7 Correct 23 ms 732 KB Output is correct
8 Correct 18 ms 788 KB Output is correct
9 Correct 18 ms 704 KB Output is correct
10 Correct 17 ms 724 KB Output is correct
11 Correct 23 ms 788 KB Output is correct
12 Correct 21 ms 724 KB Output is correct
13 Correct 22 ms 776 KB Output is correct
14 Correct 21 ms 724 KB Output is correct
15 Correct 19 ms 752 KB Output is correct
16 Correct 21 ms 688 KB Output is correct
17 Correct 20 ms 776 KB Output is correct
18 Correct 20 ms 752 KB Output is correct
19 Execution timed out 4051 ms 6912 KB Time limit exceeded
20 Halted 0 ms 0 KB -