Submission #1077917

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077917		juicy	Robots (IOI13_robots)	C++17	100 / 100	1331 ms	22496 KiB

robots

#include "robots.h"

#include <bits/stdc++.h>

int putaway(int a, int b, int t, int *x, int *y, int *w, int *s) {
  std::sort(x, x + a);
  std::sort(y, y + b);
  std::vector<int> ord(t); iota(ord.begin(), ord.end(), 0);
  std::sort(ord.begin(), ord.end(), [&](int i, int j) {
    return std::tie(w[i], s[i]) < std::tie(w[j], s[j]);
  });
  auto check = [&](int k) {
    std::priority_queue<int> pq;
    int j = 0;
    for (int i = 0; i < a; ++i) {
      while (j < t && w[ord[j]] < x[i]) {
        pq.push(s[ord[j++]]);
      }
      int could = k;
      while (pq.size() && could) {
        pq.pop();
        --could;
      }
    }
    while (j < t) {
      pq.push(s[ord[j++]]);
    }
    for (int i = b - 1; i >= 0; --i) {
      int could = k;
      while (pq.size() && pq.top() < y[i] && could) {
        pq.pop();
        --could;
      }
    }
    return !pq.size();
  };
  int l = 1, r = t, res = -1;
  while (l <= r) {
    int m = (l + r) / 2;
    if (check(m)) {
      res = m;
      r = m - 1;
    } else {
      l = m + 1;
    }
  }
  return res;
}

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