Submission #1042360

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042360		baldwinhuang1	Roller Coaster Railroad (IOI16_railroad)	C++14	11 / 100	28 ms	10184 KiB

railroad

#include <bits/stdc++.h>

using namespace std;

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    vector< pair<int, int> > st;

    if (s.size() <= 8) {
        for (int i = 0; i < s.size(); i++) {
            st.push_back({s[i], t[i]});
            // cout << s[i] << '-' << t[i] << '\n';
        }
    
        sort(st.begin(), st.end());
    
        long long minimo = 1e18;
        do {
            long long count = 0;
            for (int i = 0; i < (s.size() - 1); i++) {
                if (st[i].second > st[i + 1].first) {
                    count += (st[i].second - st[i + 1].first);
                }
            }
            // if (count == 0) {
            //     for (auto &i: st) {
            //         cout << i.first << '-' << i.second << ' ';
            //     }
            //     cout << '\n';
            // }
            minimo = min(minimo, count);
        } while (next_permutation(st.begin(), st.end()));
        return minimo;
    }

    for (int i = 0; i < s.size(); i++) {
        st.push_back({s[i], t[i]});
        // cout << s[i] << '-' << t[i] << '\n';
    }

    sort(st.begin(), st.end(), [](pair<int, int> i, pair<int, int> j){return i.second <= j.first;});

    bool state = true;

    for (int i = 0; i < (st.size() - 1); i++) {
        if (st[i].second > st[i + 1].first) {
            state = false;
        }
    }

    // for (auto &i: st) {
    //     cout << i.first << '-' << i.second << ' ';
    // }
    // cout << '\n';

    return state;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:9:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |         for (int i = 0; i < s.size(); i++) {
      |                         ~~^~~~~~~~~~
railroad.cpp:19:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |             for (int i = 0; i < (s.size() - 1); i++) {
      |                             ~~^~~~~~~~~~~~~~~~
railroad.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for (int i = 0; i < s.size(); i++) {
      |                     ~~^~~~~~~~~~
railroad.cpp:44:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for (int i = 0; i < (st.size() - 1); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~

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