oj.uz

답안 #1051123

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1051123 2024-08-09T20:27:17 Z pera 공장들 (JOI14_factories) C++17
18 / 100
 1148 ms 356032 KB 
#include<bits/stdc++.h>
#define pii pair<int , int>
#define pli pair<long long , int>
#include "factories.h"
using namespace std;
const int MAX = 1e6 + 1 , B = 500 , LOG = 20;
const long long oo = 1e16;
int T = 0 , n;
vector<int> d(MAX) , in(MAX) , order = {0};
vector<vector<int>> g(MAX);
vector<long long> D(MAX);
vector<vector<long long>> w(MAX);
vector<vector<pii>> mn(MAX , vector<pii>(LOG));
void dfs(int u , int p = 0){
   order.push_back(u);
   in[u] = ++T;
   d[u] = d[p] + 1;
   for(int x = 0;x < (int)g[u].size();x ++){
      if(g[u][x] != p){
         D[g[u][x]] = D[u] + w[u][x];
         dfs(g[u][x] , u);
         T++;
         order.push_back(u);
      }
   }
}
pii MERGE(pii x , pii y){
   if(x.second > y.second){
      swap(x , y);
   }
   return x;
}
int lca(int u , int v){
  // cout << u << " " << v << " " << in[u] << " " << in[v] << endl;
   if(in[u] > in[v]){
      swap(u , v);
   }
   int sz = 31 - __builtin_clz(in[v] - in[u] + 1);
   //cout << mn[in[v] - (1 << sz) + 1][sz].first << " " << mn[in[v] - (1 << sz) + 1][sz].second << endl;
   return MERGE(mn[in[u]][sz] , mn[in[v] - (1 << sz) + 1][sz]).first;
}
void Init(int N , int A[] , int B[] , int D[]){
   n = N;
   for(int i = 0;i < N - 1;i ++){
      ++A[i] , ++B[i];
      g[A[i]].push_back(B[i]);
      w[A[i]].push_back(D[i]);
      g[B[i]].push_back(A[i]);
      w[B[i]].push_back(D[i]);
   }
   dfs(1);
   for(int bit = 0;bit < LOG;bit ++){
      if(bit == 0){
         for(int i = 1;i < (int)order.size();i ++){
            mn[i][bit] = {order[i] , d[order[i]]};
         }
      }else{
         for(int i = 1;i + (1 << bit) - 1 < (int)order.size();i ++){
            mn[i][bit] = MERGE(mn[i][bit - 1] , mn[i + (1 << (bit - 1))][bit - 1]);
         }
      }
   }
}
long long Query(int S , int X[] , int T , int Y[]){
   long long ans = oo;
   for(int i = 0;i < S;i ++){
      ++X[i];
   }
   for(int i = 0;i < T;i ++){
      ++Y[i];
   }
   if(T > B){
      vector<long long> e(n + 1 , -1);
      priority_queue<pli , vector<pli> , greater<pli>> pq;
      for(int i = 0;i < T;i ++){
         e[Y[i]] = 0LL;
         pq.push({0LL , Y[i]});
      }
      while(pq.size()){
         auto [s , u] = pq.top();
         pq.pop();
         if(s != e[u]){
            continue;
         }
         for(int x = 0;x < (int)g[u].size();x ++){
            if(e[g[u][x]] == -1 || e[g[u][x]] > s + w[u][x]){
               e[g[u][x]] = s + w[u][x];
               pq.push({e[g[u][x]] , g[u][x]});
            }
         }
      }
   }else{
      for(int i = 0;i < S;i ++){
         for(int j = 0;j < T;j ++){
            ans = min(ans , D[X[i]] + D[Y[j]] - 2 * D[lca(X[i] , Y[j])]);
         }
      }
   }
   return ans;
}

Subtask #1
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 269136 KB Output is correct
2 Incorrect 1148 ms 275140 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 268880 KB Output is correct
2 Correct 813 ms 313868 KB Output is correct
3 Correct 992 ms 333240 KB Output is correct
4 Correct 680 ms 334640 KB Output is correct
5 Correct 812 ms 356032 KB Output is correct
6 Correct 830 ms 334752 KB Output is correct
7 Correct 661 ms 297924 KB Output is correct
8 Correct 487 ms 298752 KB Output is correct
9 Correct 532 ms 301248 KB Output is correct
10 Correct 484 ms 298920 KB Output is correct

Subtask #3
0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 269136 KB Output is correct
2 Incorrect 1148 ms 275140 KB Output isn't correct
3 Halted 0 ms 0 KB -