Submission #1271014

#	Time	Username	Problem	Language	Result	Execution time	Memory
1271014		velislavgarkov	Roller Coaster Railroad (IOI16_railroad)	C++20	0 / 100	83 ms	9404 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 2e5 + 10;

struct Point {
    int x;
    bool type;
    int ind;

    friend bool operator < (Point &a, Point &b) {
        if (a.x != b.x) return a.x < b.x;
        return a.type > b.type;
    }
};

Point point[2 * MAXN];
bool used[MAXN];
int n;

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

    if (n > 0) {
        for (int i = 0; i < n; i++) {
            point[i * 2] = {s[i], 0, i};
            point[i * 2 + 1] = {t[i], 1, i};
        }
        sort(point, point + 2*n);

        int cnt = 0;
        priority_queue <pair <int, int>> pq;
        for (int i = 0; i < 2 * n; i++) {
            if (point[i].type == 0) {
                if (pq.empty()) return 1;
                auto cur = pq.top();
                pq.pop();
                if (cur.second == point[i].ind) {
                    pq.pop();
                    if (pq.empty()) return 1;
                    pq.pop();
                    pq.push(cur);
                }
            } else {
                pq.push({s[point[i].ind], point[i].ind});
            }
        }
        return 0;
    }
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type]
   51 | }
      | ^
railroad.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
railroad_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

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