Submission #69066

#	Time	Username	Problem	Language	Result	Execution time	Memory
69066		Kubalionzzale	Roller Coaster Railroad (IOI16_railroad)	C++14	30 / 100	542 ms	80500 KiB

railroad

#include "railroad.h"

#include <iostream>
#include <algorithm>
#include <functional>
#include <set>
#include <map>

int n;
std::pair<int, int> a[200010];
std::multiset< int, std::greater<int> > set;
//first - output speed, second - index

bool compare(const std::pair<int, int> &lhs, const std::pair<int, int> &rhs)
{
  if (lhs.first != rhs.first)
    return lhs.first < rhs.first;
  else
    return lhs.second < rhs.second;
}

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
  n = (int) s.size();

  for (int i = 0; i < n; ++i)
  {
    a[i].first = s[i];
    a[i].second = t[i];

    set.insert(a[i].second);
  }

  set.insert(1);

  std::sort(a, a + n, compare);
  for (int i = 0; i < n; ++i)
  {
    bool flag = false;
    if (set.find(a[i].second) != set.end())
      flag = true;

    if (flag)
      set.erase(set.find(a[i].second));
    auto it = set.lower_bound(a[i].first);

    if (it == set.end())
      return 1;

    set.erase(it);
    if (flag)
      set.insert(a[i].second);
  }

  return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 30 / 30
• Subtask 4: 0 / 36