Submission #1207522

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207522		mychecksedad	Escape Route 2 (JOI24_escape2)	C++20	100 / 100	210 ms	65312 KiB

Main

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define vi vector<int>
const int N = 3e5+100, M = 1e5+10, K = 52, MX = 30;
const ll INF = 1e18;

int n, dep[N];
ll t, ANS[N], DEP[N];
vector<array<ll, 3>> go[N];
array<ll, 2> to[N];
vector<pair<int, ll>> g[N], Q[N], QQ[N];
vi T[N];
void solve(){
  cin >> n >> t;
  int id = 1;
  for(int i = 1; i < n; ++i){
    int m; cin >> m;
    for(int j = 0; j < m; ++j){
      int l, r; cin >> l >> r;
      go[i].pb({l, r, id++});
      dep[id - 1] = i;
    }
    sort(all(go[i]));
    vector<array<ll, 3>> v;
    for(int j = m-1; j >= 0; --j){
      if(v.empty()) v.pb(go[i][j]);
      else{
        if(v.back()[1] > go[i][j][1]){
          v.pb(go[i][j]);
        }
      }
    }
    reverse(all(v));
    v.swap(go[i]);
  }
  for(int i = 1; i + 1 < n; ++i){
    for(auto [l, r, ID]: go[i]){
      ll w = 0;
      int pos = lower_bound(all(go[i + 1]), array<ll, 3>{r, -1, -1}) - go[i + 1].begin();
      if(pos == go[i + 1].size()) pos = 0, w = go[i + 1][pos][1] + t - r;
      else w = go[i + 1][pos][1] - r;
      to[ID] = {w, go[i + 1][pos][2]};
      g[to[ID][1]].pb({ID, w});
    }
  }
  int q; cin >> q;
  const int C = 600;
  for(int i = 1; i <= q; ++i){
    int l, r; cin >> l >> r;
    if(go[l].size() >= C)
      Q[l].pb({r, i});
    else
      QQ[r].pb({l, i});
  }

  vector<int> POS(N);
  vector<int> root(N);

  for(auto [l, r, ID]: go[n - 1]) DEP[ID] = 0;
  for(int i = n - 2; i >= 1; --i){
    for(auto [l, r, ID]: go[i]){
      DEP[ID] = DEP[to[ID][1]] + to[ID][0];
      // cerr << ID << ' ' << DEP[ID] << '\n';
    }
  }

  ll query_1_2 = INF;

  int cur_t = 0;
  for(auto [l, r, ID]: go[1]){
    T[cur_t++].pb(ID);
    POS[ID] = cur_t - 1;
    root[cur_t - 1] = ID;
    query_1_2 = min(query_1_2, r - l);
  }

  for(auto [l, idx]: QQ[2]) ANS[idx] = query_1_2;

  for(int i = 2; i < n; ++i){
    for(auto [l, r, ID]: go[i]){
      int big = -1;
      for(auto [u, w]: g[ID]){
        if(big == -1 || T[POS[u]].size() > T[POS[big]].size()) big = u;
      }
      if(big == -1){
        T[cur_t++].pb(ID);
        POS[ID] = cur_t - 1;
      }else{
        POS[ID] = POS[big];
        T[POS[ID]].pb(ID);
      }
      root[POS[ID]] = ID;
      for(auto [u, w]: g[ID]){
        if(u != big){
          for(auto v: T[POS[u]]){
            T[POS[ID]].pb(v);
            POS[v] = POS[ID];
          }
        }
      }
    }
    for(auto [l, idx]: QQ[i + 1]){
      ll mn = INF;
      for(auto [L, R, ID]: go[l]){
        mn = min(mn, DEP[ID] - DEP[root[POS[ID]]] + R - L);
      }
      ANS[idx] = mn;
    }
  }
  



  vector<ll> res(n + 1);
  vector<ll> dist(N);
  for(int i = 1; i < n; ++i){
    if(go[i].size() >= C){
    
      ll mn = INF;
      for(auto [l, r, ID]: go[i]){
        dist[ID] = r - l;
        mn = min(mn, dist[ID]);
      }
      res[i + 1] = mn;

      for(int j = i + 1; j < n; ++j){
        mn = INF;

        for(auto [l, r, ID]: go[j]){
          dist[ID] = INF;
          for(auto [u, w]: g[ID]){
            dist[ID] = min(dist[ID], dist[u] + w);
          }
          mn = min(mn, dist[ID]);
        }

        res[j + 1] = mn;
      }

      for(auto [l, idx]: Q[i]){
        ANS[idx] = res[l];
      }
    }
  }


  for(int i = 1; i <= q; ++i){
    cout << ANS[i] << '\n';
  }
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

• Subtask 1: 6 / 6
• Subtask 2: 8 / 8
• Subtask 3: 17 / 17
• Subtask 4: 23 / 23
• Subtask 5: 36 / 36
• Subtask 6: 10 / 10