Submission #69016

#	Time	Username	Problem	Language	Result	Execution time	Memory
69016		Kubalionzzale	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	336 ms	28936 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);
  bool flag = false;
    for (int i = 0; i < n; ++i)
    {
      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;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:42:7: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
       if (flag)
       ^~
railroad.cpp:44:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
         auto it = set.lower_bound(a[i].first);
         ^~~~

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