Submission #443088

#	Time	Username	Problem	Language	Result	Execution time	Memory
443088		ltf0501	Dungeons Game (IOI21_dungeons)	C++17	13 / 100	201 ms	129336 KiB

dungeons

#include "dungeons.h"
#include <bits/stdc++.h>
using namespace std;

const int kN = 4e5 + 10;
const int kC = 25;
// subtask 1, 2, 3
int n;
vector<int> s, p, w, l;
vector<int> uni_s;
long long suf[kN];
int climb[5][kC][kN], MAX; // 0: win, 1: lose
long long max_pow[5][kC][kN], gained_pow[5][kC][kN];
void init(int _n, vector<int> _s, vector<int> _p, vector<int> _w, vector<int> _l) {
  n = _n, s = _s, p = _p, w = _w, l = _l;
  w.push_back(n), s.push_back(0);
  
  for(int i = n - 1; i >= 0; i--) suf[i] = s[i] + suf[w[i]], MAX = max(MAX, s[i]);
  for(int i = 0; i <= n; i++) uni_s.push_back(s[i]);
  sort(uni_s.begin(), uni_s.end());
  uni_s.resize(unique(uni_s.begin(), uni_s.end()) - uni_s.begin());
  int m = int(uni_s.size());
  auto get_id = [&](int x) {
    return int(lower_bound(uni_s.begin(), uni_s.end(), x) - uni_s.begin());
  };

  for(int i = 0; i <= n; i++) {
    int id = get_id(s[i]);
    for(int j = 0; j < m; j++) { 
      if(j >= id) { // dp[j][][] power at least uni_s[j]
        climb[j][0][i] = w[i];
        max_pow[j][0][i] = MAX;
        gained_pow[j][0][i] = s[i];
      }
      else {
        climb[j][0][i] = l[i];
        max_pow[j][0][i] = s[i] - 1;
        gained_pow[j][0][i] = p[i];
      }
    }
  }

  for(int j = 1; j < kC; j++) {
    for(int i = 0; i <= n; i++) {
      for(int o = 0; o < m; o++) {
        climb[o][j][i] = climb[o][j - 1][climb[o][j - 1][i]];
        max_pow[o][j][i] = min(max_pow[o][j - 1][i], max_pow[o][j - 1][climb[o][j - 1][i]] - gained_pow[o][j - 1][i]);
        gained_pow[o][j][i] = gained_pow[o][j - 1][i] + gained_pow[o][j - 1][climb[o][j - 1][i]];
      }
    }
  }

	return;
}

long long simulate(int x, int z) {
  long long res = z;
  while(x < n && res < MAX) {
    int id = upper_bound(uni_s.begin(), uni_s.end(), res) - uni_s.begin() - 1;
    //cerr << "id = " << id << '\n';
    for(int j = kC - 1; j >= 0; j--) {
      if(res > max_pow[id][j][x]) continue;
      res += gained_pow[id][j][x], x = climb[id][j][x];
    }
    //cerr << "x = " << x << ", pow = " << res << '\n';
    res += s[x], x = w[x];
  }

  res += suf[x];
  //cerr << "Finish\n";
  return res;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 26
• Subtask 3: 13 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 27
• Subtask 6: 0 / 11