Submission #729647

#	Time	Username	Problem	Language	Result	Execution time	Memory
729647		NeroZein	Robots (IOI13_robots)	C++17	39 / 100	436 ms	65536 KiB

robots

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

const int N = 50004;  
const int T = 1000006;

int x[T], y[T];
int w[T], s[T];

int putaway(int A, int B, int T_, int X[], int Y[], int W[], int S[]) {
  int a, b, t;
  a = A;
  b = B;
  t = T_;
  for (int i = 0; i < a; ++i) {
    x[i] = X[i];
  }
  sort(x, x + a);
  for (int i = 0; i < b; ++i) {
    y[i] = Y[i];
  }
  sort(y, y + b); 
  for (int i = 0; i < t; ++i) {
    w[i] = W[i], s[i] = S[i]; 
  }
  vector<pair<int, int>> toy(t); 
  for (int i = 0; i < t; ++i) {
    toy[i] = {w[i], s[i]};
  }
  sort(toy.begin(), toy.end(), greater<pair<int, int>>()); 
  auto ch = [&](int mid) {
    multiset<int> se; 
    for (int i = b - 1; i >= 0; --i) {
      for (int j = 0; j < mid; ++j) {
        se.insert(y[i]); 
        if (se.size() == T) {
          break; 
        }
      }
    }
    vector<bool> done(t); 
    for (int i = 0; i < t; ++i) {
      auto it = se.upper_bound(toy[i].second); 
      if (it != se.end()) {
        se.erase(it); 
        done[i] = true; 
      }
    }
    se.clear(); 
    //cout << mid << '\n';
    //for (int i = 0; i < t; ++i) {
      //cout << done[i] << " \n"[i == t - 1]; 
    //}
    for (int i = a - 1; i >= 0; --i) {
      for (int j = 0; j < mid; ++j) {
        se.insert(x[i]); 
        if (se.size() == T) {
          break; 
        }
      }
    }
    for (int i = 0; i < t; ++i) {
      auto it = se.upper_bound(toy[i].first); 
      if (done[i]) continue; 
      if (it != se.end()) {
        se.erase(it); 
        done[i] = true; 
      }
    }
    bool ok = true; 
    for (int i = 0; i < t; ++i) {
      ok &= done[i];
    }
    return ok; 
  };
  int l = 1, r = t + 1;
  while (l < r) {
    int mid = (l + r) >> 1; 
    if (ch(mid)) {
      r = mid;
    } else {
      l = mid + 1; 
    }
  }
  return (l == t + 1 ? -1 : l);
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 25 / 25
• Subtask 4: 0 / 37
• Subtask 5: 0 / 10