Submission #169295

#	Time	Username	Problem	Language	Result	Execution time	Memory
169295		AlexLuchianov	Robots (IOI13_robots)	C++14	100 / 100	1973 ms	24908 KiB

robots

#include "robots.h"
#include <vector>
#include <algorithm>
#include <queue>
#include <iostream>

struct Toy{
  int weight;
  int size;
  bool operator < (Toy const &a) const{
    return weight < a.weight;
  }
};
int const nmax = 1000000;
Toy v[1 + nmax];
int weak[1 + nmax], small[1 + nmax];

int N, M, T;

bool test(int time){
  int ptr = 0;
  std::priority_queue<int> pq;

  for(int i = 0; i < N; i++) {
    while(ptr < T && v[ptr].weight < weak[i])
      pq.push(v[ptr++].size);
    for(int h = 0;h < time; h++)
      if(0 < pq.size())
        pq.pop();
      else
        break;
  }

  while(ptr < T)
    pq.push(v[ptr++].size);

  for(int i = M - 1;0 <= i; i--){
    for(int h = 0; h < time; h++)
      if(0 < pq.size() && pq.top() < small[i])
        pq.pop();
      else
        break;
  }
  return 0 == pq.size();
}

int binarysearch(int from, int to){
  if(from < to){
    int mid = (from + to) / 2;
    if(test(mid) == 1)
      return binarysearch(from, mid);
    else
      return binarysearch(mid + 1, to);
  } else
    return from;
}

int putaway(int N_, int M_, int T_, int X[], int Y[], int W[], int S[]) {
  N = N_;
  M = M_;
  T = T_;
  std::sort(X, X + N);
  std::sort(Y, Y + M);

  for(int i = 0; i < N; i++)
    weak[i] = X[i];
  for(int i = 0; i < M; i++)
    small[i] = Y[i];

  for(int i = 0; i < T; i++) {
    v[i].weight = W[i];
    v[i].size = S[i];
  }
  std::sort(v, v + T);
  //*
  int result = binarysearch(1, T + 1);
  if(result == T + 1)
    return -1;
  else
    return result;
  //*/
}

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