Submission #636912

#	Time	Username	Problem	Language	Result	Execution time	Memory
636912		tabr	Roller Coaster Railroad (IOI16_railroad)	C++17	30 / 100	621 ms	26136 KiB

railroad

#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    s.emplace_back((int) 1e9);
    t.emplace_back(1);
    int n = (int) s.size();
    multiset<pair<int, int>> st, ts;
    for (int i = 0; i < n; i++) {
        st.emplace(s[i], t[i]);
        ts.emplace(t[i], s[i]);
    }
    while (st.size() > 1) {
        auto p = *ts.rbegin();
        ts.erase(ts.find(p));
        swap(p.first, p.second);
        st.erase(st.find(p));
        auto q = *st.rbegin();
        swap(q.first, q.second);
        ts.erase(ts.find(q));
        swap(q.first, q.second);
        st.erase(st.find(q));
        if (p.second > q.first) {
            return 1;
        }
        st.emplace(p.first, q.second);
        ts.emplace(q.second, p.first);
    }
    auto p = *st.begin();
    if (p.first < p.second) {
        return 1;
    } else {
        return 0;
    }
}

#ifdef tabr
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    debug(plan_roller_coaster({1, 4, 5, 6}, {7, 3, 8, 6}));
    return 0;
}
#endif

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