Submission #510009

#	Time	Username	Problem	Language	Result	Execution time	Memory
510009		jesus_coconut	Robots (IOI13_robots)	C++17	76 / 100	3020 ms	14676 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>

using namespace std;

int const kT = 1000005;

bool used[kT];
int perm[kT];


int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
  sort(X, X + A);
  sort(Y, Y + B);
  iota(perm, perm + T, 0);
  priority_queue<pair<int, int>> pq;
  auto check = [&](int t) -> bool {
	memset(used, 0, sizeof used);
	sort(perm, perm + T, [&](int a, int b) {
	  return make_tuple(W[a], S[a]) < make_tuple(W[b], S[b]);
	});
	pq = priority_queue<pair<int, int>>();
	int p = 0;
	for (int i = 0; i < A; ++i) {
	  while (p < T && W[perm[p]] < X[i]) {
		pq.emplace(S[perm[p]], perm[p]);
		++p;
	  }
	  for (int j = 0; j < t && !pq.empty(); ++j) {
		auto [s, idx] = pq.top();
		used[idx] = true;
		pq.pop();
	  }
	}
	sort(perm, perm + T, [&](int a, int b) {
	  return make_tuple(S[a], W[a]) < make_tuple(S[b], W[b]);
	});
	pq = priority_queue<pair<int, int>>();
	p = 0;
	for (int i = 0; i < B; ++i) {
	  while (p < T && S[perm[p]] < Y[i]) {
		if (!used[perm[p]]) {
		  pq.emplace(W[perm[p]], perm[p]);
		}
		++p;
	  }
	  for (int j = 0; j < t && !pq.empty(); ++j) {
		auto [w, idx] = pq.top();
		used[idx] = true;
		pq.pop();
	  }
	}
	return all_of(used, used + T, [](bool b) { return b; });
  };

  int lo = 0, hi = T + 1;
  while (lo < hi) {
	int mid = (lo + hi) / 2;
	if (check(mid)) {
	  hi = mid;
	} else lo = mid + 1;
  }
  if (lo > T) return -1;
  else return lo;
}

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