Submission #69783

#	Time	Username	Problem	Language	Result	Execution time	Memory
69783		Kubalionzzale	Roller Coaster Railroad (IOI16_railroad)	C++14	Compilation error	0 ms	0 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> 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));
    int val = set.begin();

    if (val > a[i].first)
      return 1;

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

  return 0;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:45:25: error: cannot convert 'std::multiset<int>::iterator {aka std::_Rb_tree_const_iterator<int>}' to 'int' in initialization
     int val = set.begin();
                         ^