Submission #231667

#	Time	Username	Problem	Language	Result	Execution time	Memory
231667		quocnguyen1012	Robots (IOI13_robots)	C++14	76 / 100	627 ms	26784 KiB

robots

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

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define ar array

using namespace std;
typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 2e5 + 5;

vector<int> query[maxn];

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[])
{
  sort(X, X + A); sort(Y, Y + B);
  int n = A + B;
  for(int i = 0; i < T; ++i){
    int l = upper_bound(X, X + A, W[i]) - X;
    int r = upper_bound(Y, Y + B, S[i]) - Y;
    r = B - r - 1;
    r += A;
    query[l].eb(r);
  }
  auto check = [&](int mx)
  {
    priority_queue<int, vector<int>, greater<int>> pq;
    for(int l = 0; l < n; ++l){
      for(int r : query[l]) pq.push(r);
      for(int i = 0; i < mx; ++i){
        if(pq.empty()) break;
        if(pq.top() < l) return false;
        pq.pop();
      }
    }
    return pq.empty();
  };
  if(!check(T)) return -1;
  int l = 1, r = T, mid;
  while(l <= r){
    mid = (l + r) / 2;
    if(!check(mid)) l = mid + 1;
    else r = mid - 1;
  }
  return l;
}

#ifdef LOCAL
signed main(void)
{
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #ifdef LOCAL
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  #endif // LOCAL
  int A, B, T;
  cin >> A >> B >> T;
  int X[A], Y[B], W[T], S[T];
  for(int i = 0; i < A; ++i)
    cin >> X[i];
  for(int i = 0; i < B; ++i)
    cin >> Y[i];
  for(int i = 0; i < T; ++i)
    cin >> W[i] >> S[i];
  cout << putaway(A, B, T, X, Y, W, S);
}
#endif

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