제출 #68965

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
68965		Kubalionzzale	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	357 ms	18316 KiB

railroad

#include "railroad.h"

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

int n;
std::pair<int, int> a[200010];
std::set< std::pair<int, int>, std::greater< std::pair<int, 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.second > rhs.second;
    else
        return lhs.first > rhs.first;
}

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(std::make_pair(t[i], i));
    }

    set.insert(std::make_pair(1, -1));

    std::sort(a, a + n, compare);
    for (int i = 0; i < n; ++i)
    {
        auto it = set.lower_bound(std::make_pair(s[i], -1));

        if (it == set.end())
            return 0;

        set.erase(it);
    }

    return 1;
}

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