oj.uz

답안 #995248

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
995248 2024-06-08T17:37:39 Z huutuan 은하철도 (APIO24_train) C++17
5 / 100
 836 ms 1048576 KB 
#include "train.h"

#include <vector>

#include <bits/stdc++.h>

using namespace std;
using ll=long long;

const int N=1e6+10, S=1000;
const ll inf=1e18;

struct Node{
   ll val, lazy;
   Node (ll _val=0){
      val=_val, lazy=0;
   }
   Node operator+(const Node &a){
      return Node(min(val, a.val));
   }
};

struct SegmentTree{
   int n;
   vector<Node> t;
   void init(int _n, ll val=0){
      n=_n;
      t.assign(4*n+1, Node(val));
      t[0]=Node(inf);
   }
   void apply(int k, ll val){
      t[k].val+=val;
      t[k].lazy+=val;
   }
   void push(int k){
      if (t[k].lazy){
         apply(k<<1, t[k].lazy);
         apply(k<<1|1, t[k].lazy);
         t[k].lazy=0;
      }
   }
   void update(int k, int l, int r, int L, int R, ll val){
      if (r<L || R<l) return;
      if (L<=l && r<=R){
         apply(k, val);
         return;
      }
      push(k);
      int mid=(l+r)>>1;
      update(k<<1, l, mid, L, R, val);
      update(k<<1|1, mid+1, r, L, R, val);
      t[k]=t[k<<1]+t[k<<1|1];
   }
   Node get(int k, int l, int r, int L, int R){
      if (r<L || R<l) return t[0];
      if (L<=l && r<=R) return t[k];
      push(k);
      int mid=(l+r)>>1;
      return get(k<<1, l, mid, L, R)+get(k<<1|1, mid+1, r, L, R);
   }
} st;

struct State{
   int u, time, type;
   State (int _u=0, int _time=0, int _type=0){
      u=_u, time=_time, type=_type;
   }
   bool operator<(const State &a){
      return tie(u, time, type)<tie(a.u, a.time, a.type);
   }
   bool operator==(const State &a){
      return tie(u, time, type)==tie(a.u, a.time, a.type);
   }
};

vector<State> vs;
vector<int> vt;

int n, m, cost[N], heavy[N];
vector<pair<int, ll>> g[N];
vector<int> vv[N];
ll f[N];
int vis[N];
vector<pair<int, pair<int, int>>> query[N];
vector<int> add[N];
priority_queue<pair<ll, int>, vector<pair<ll, int>>, greater<pair<ll, int>>> pq;

void process_heavy(int u){
   st.init((int)vt.size(), inf);
   for (int i=1; i<(int)vv[u].size(); i+=2) st.update(1, 1, st.n, vs[vv[u][i]].time, vs[vv[u][i]].time, f[vv[u][i]]-inf);
   for (int i=0, j=0; i<(int)vt.size(); ++i){
      for (int k:add[i]) st.update(1, 1, st.n, 1, k, cost[u]);
      while (j<(int)vv[u].size() && (vs[vv[u][j]].time<i)) j+=2;
      if (j>=(int)vv[u].size()) break;
      if (vs[vv[u][j]].time==i){
         f[vv[u][j]]=min(f[vv[u][j]], st.get(1, 1, st.n, 1, i).val);
         pq.emplace(f[vv[u][j]], vv[u][j]);
      }
   }
}

long long solve(int N_, int M, int W, std::vector<int> T, std::vector<int> X, std::vector<int> Y,
                std::vector<int> A, std::vector<int> B, std::vector<int> C, std::vector<int> L,
                std::vector<int> R) {
   n=N_, m=M;
   for (int i=0; i<n; ++i) cost[i]=T[i];
   for (int i=0; i<W; ++i){
      vt.push_back(L[i]);
      vt.push_back(R[i]);
   }
   vt.push_back(-1);
   vt.push_back(0); vt.push_back(1e9);
   for (int i=0; i<m; ++i) vt.push_back(A[i]), vt.push_back(B[i]);
   sort(vt.begin(), vt.end()); vt.resize(unique(vt.begin(), vt.end())-vt.begin());
   st.init((int)vt.size());
   for (int i=0; i<W; ++i){
      L[i]=lower_bound(vt.begin(), vt.end(), L[i])-vt.begin();
      R[i]=lower_bound(vt.begin(), vt.end(), R[i])-vt.begin();
   }
   for (int i=0; i<m; ++i){
      A[i]=lower_bound(vt.begin(), vt.end(), A[i])-vt.begin();
      B[i]=lower_bound(vt.begin(), vt.end(), B[i])-vt.begin();
      vs.emplace_back(X[i], A[i], 0);
      vs.emplace_back(X[i], A[i], 1);
      vs.emplace_back(Y[i], B[i], 0);
      vs.emplace_back(Y[i], B[i], 1);
   }
   vs.emplace_back(0, 1, 0);
   vs.emplace_back(0, 1, 1);
   vs.emplace_back(n-1, (int)vt.size()-1, 0);
   vs.emplace_back(n-1, (int)vt.size()-1, 1);
   sort(vs.begin(), vs.end()); vs.resize(unique(vs.begin(), vs.end())-vs.begin());
   for (int i=0; i<m; ++i){
      int i1=lower_bound(vs.begin(), vs.end(), State(X[i], A[i], 0))-vs.begin();
      int i2=lower_bound(vs.begin(), vs.end(), State(Y[i], B[i], 1))-vs.begin();
      g[i1].emplace_back(i2, C[i]);
   }
   for (int i=0; i<(int)vs.size(); ++i) vv[vs[i].u].push_back(i);
   for (int i=0; i<n; ++i) heavy[i]=(int)vv[i].size()>=S, f[i]=inf;
   heavy[0]=1;
   for (int i=0; i<n; ++i) if (!heavy[i]){
      for (int j=1; j<(int)vv[i].size(); j+=2) for (int k=j-1; k<(int)vv[i].size(); k+=2){
         query[vs[vv[i][k]].time].push_back({vs[vv[i][j]].time, {vv[i][j], (int)g[vv[i][j]].size()}});
         g[vv[i][j]].emplace_back(vv[i][k], 0);
      }
   }
   for (int i=0; i<W; ++i) add[R[i]+1].push_back(L[i]-1);
   for (int i=0; i<(int)vt.size(); ++i){
      for (int j:add[i]) st.update(1, 1, st.n, 1, j, 1);
      for (auto &j:query[i]) g[j.second.first][j.second.second].second=st.get(1, 1, st.n, j.first, j.first).val*cost[vs[j.second.first].u];
   }
   for (int i=0; i<N; ++i) f[i]=inf;
   // for (int i=0; i<N; ++i) for (auto &e:g[i]){
   //    int j=e.first, w=e.second;
   //    cout << vs[i].u << ' ' << vt[vs[i].time] << ' ' << vs[i].type << ' ' << vs[j].u << ' ' << vt[vs[j].time] << ' ' << vs[j].type << ' ' << w << '\n';
   // }
   f[1]=0;
   process_heavy(0);
   vector<int> qq;
   while (pq.size()){
      while (pq.size()){
         int u=pq.top().second;
         ll d=pq.top().first;
         pq.pop();
         if (f[u]!=d) continue;
         for (auto &e:g[u]){
            int v=e.first;
            ll w=e.second;
            if (f[v]>d+w){
               f[v]=d+w;
               if (heavy[vs[v].u]){
                  if (!vis[vs[v].u]){
                     vis[vs[v].u]=1;
                     qq.push_back(vs[v].u);
                  }
               }else pq.emplace(f[v], v);
            }
         }
      }
      for (int u:qq) process_heavy(u);
      qq.clear();
   }
   ll ans=f[(int)vs.size()-2];
   if (ans==inf) ans=-1;
   return ans;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 108888 KB Correct.
2 Correct 19 ms 107480 KB Correct.
3 Correct 20 ms 107864 KB Correct.
4 Correct 21 ms 108380 KB Correct.
5 Correct 17 ms 107100 KB Correct.
6 Correct 18 ms 107224 KB Correct.
7 Correct 17 ms 107096 KB Correct.

Subtask #2
0.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 820 ms 242616 KB Correct.
2 Correct 382 ms 159668 KB Correct.
3 Correct 18 ms 107096 KB Correct.
4 Correct 26 ms 107856 KB Correct.
5 Correct 17 ms 107100 KB Correct.
6 Runtime error 836 ms 1048576 KB Execution killed with signal 9
7 Halted 0 ms 0 KB -

Subtask #3
0.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 820 ms 242616 KB Correct.
2 Correct 382 ms 159668 KB Correct.
3 Correct 18 ms 107096 KB Correct.
4 Correct 26 ms 107856 KB Correct.
5 Correct 17 ms 107100 KB Correct.
6 Runtime error 836 ms 1048576 KB Execution killed with signal 9
7 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 108888 KB Correct.
2 Correct 19 ms 107480 KB Correct.
3 Correct 20 ms 107864 KB Correct.
4 Correct 21 ms 108380 KB Correct.
5 Correct 17 ms 107100 KB Correct.
6 Correct 18 ms 107224 KB Correct.
7 Correct 17 ms 107096 KB Correct.
8 Correct 820 ms 242616 KB Correct.
9 Correct 382 ms 159668 KB Correct.
10 Correct 18 ms 107096 KB Correct.
11 Correct 26 ms 107856 KB Correct.
12 Correct 17 ms 107100 KB Correct.
13 Runtime error 836 ms 1048576 KB Execution killed with signal 9
14 Halted 0 ms 0 KB -