제출 #963759

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
963759		Trisanu_Das	Fountain (eJOI20_fountain)	C++17	100 / 100	303 ms	37684 KiB

fountain

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
 
int n, q, jump[100005][20], h2o[100005][20];
 
signed main(){
  ios_base::sync_with_stdio(false); cin.tie(nullptr);
  cin >> n >> q;
  priority_queue<pair<int, int>, vector<pair<int, int> >, greater<pair<int, int> > > pq;
  for(int i = 1; i <= n; i++){
    int d; cin >> d >> h2o[i][0];
    while(!pq.empty() && pq.top().ff < d){
      jump[pq.top().ss][0] = i;
      pq.pop();
    }
    pq.push({d, i});
  }
  while(!pq.empty()){
    jump[pq.top().ss][0] = 0;
    pq.pop();
  }
  jump[0][0] = 0; h2o[0][0] = 0;
  for(int j = 1; j < 20; j++)
    for(int i = 0; i <= n; i++){
      jump[i][j] = jump[jump[i][j - 1]][j - 1];
      h2o[i][j] = h2o[i][j - 1] + h2o[jump[i][j - 1]][j - 1];
    }
  
  while(q--){
    int r, v; cin >> r >> v;
    for(int i = 19; i >= 0; i--){
      if(h2o[r][i] >= v) continue;
      v -= h2o[r][i];
      r = jump[r][i];
    }
    cout << r << '\n';
  }
}

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40