Submission #601455

#	Time	Username	Problem	Language	Result	Execution time	Memory
601455		skittles1412	Mechanical Doll (IOI18_doll)	C++17	56.57 / 100	143 ms	19540 KiB

doll

#include "bits/extc++.h"

using namespace std;

template <typename T>
void dbgh(const T& t) {
    cerr << t << endl;
}

template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
    cerr << t << " | ";
    dbgh(u...);
}

#ifdef DEBUG
#define dbg(...)                                              \
    cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: "; \
    dbgh(__VA_ARGS__);
#else
#define dbg(...)
#define cerr   \
    if (false) \
    cerr
#endif

#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())

void answer(vector<int> C, vector<int> X, vector<int> Y);

vector<pair<int, int>> ans;

pair<int, int> alloc() {
    int o = sz(ans), oind = -o - 1;
    ans.emplace_back(0, 0);
    return {o, oind};
}

int construct(const vector<int>& arr) {
    if (sz(arr) == 1) {
        return arr[0];
    }
    auto [o, oind] = alloc();
    // auto [a, aind] = alloc();
    // int r = construct({arr[2], arr[6], arr[8]});
    // ans[a] = {
    //     construct({arr[0], arr[1], arr[3], arr[4], arr[5], arr[7], oind,
    //     aind}), r};
    // ans[o] = {aind, ans[a].first};
    // return oind;
    if (sz(arr) >= 9 && sz(arr) % 4 == 1) {
        auto [a, aind] = alloc();
        vector<int> l, r;
        for (int i = 2; i < sz(arr); i += 4) {
            l.push_back(arr[i]);
        }
        l.push_back(arr.back());
        for (int i = 0; i + 1 < sz(arr); i += 4) {
            r.push_back(arr[i]);
            r.push_back(arr[i + 1]);
            r.push_back(arr[i + 3]);
        }
        r.push_back(oind);
        r.push_back(aind);
        swap(l, r);
        dbg(sz(l), sz(r));
        ans[a] = {construct(l), construct(r)};
        ans[o] = {aind, ans[a].first};
        return oind;
    }
    // if (sz(arr) == 10) {
    //     auto [a, aind] = alloc();
    //     int r = construct({arr[2], arr[6], arr[9]});
    //     ans[a] = {construct({arr[0], arr[1], arr[3], arr[4], arr[5], arr[7],
    //                          arr[8], aind}),
    //               r};
    //     ans[o] = {aind, ans[a].first};
    //     return oind;
    // }
    if (sz(arr) >= 10 && sz(arr) % 4 == 2) {
        auto [a, aind] = alloc();
        vector<int> l, r;
        for (int i = 2; i < sz(arr); i += 4) {
            l.push_back(arr[i]);
        }
        l.push_back(arr.back());
        for (int i = 0; i + 1 < sz(arr); i++) {
            if (i % 4 != 2) {
                r.push_back(arr[i]);
            }
        }
        r.push_back(aind);
        swap(l, r);
        dbg(sz(l), sz(r));
        ans[a] = {construct(l), construct(r)};
        ans[o] = {aind, ans[a].first};
        return oind;
    }
    vector<int> l, r;
    for (int i = 0; i < sz(arr); i++) {
        if (i % 2 == 0) {
            l.push_back(arr[i]);
        } else {
            r.push_back(arr[i]);
        }
    }
    if (sz(arr) % 2 == 1) {
        r.push_back(l.back());
        l.back() = oind;
    }
    ans[o] = {construct(l), construct(r)};
    return oind;
}

void create_circuit(int m, vector<int> arr) {
    vector<int> nxt[m + 1];
    arr.insert(arr.begin(), 0);
    arr.push_back(0);
    for (int i = 0; i < sz(arr) - 1; i++) {
        nxt[arr[i]].push_back(arr[i + 1]);
    }
    vector<int> ans1(m + 1);
    for (int i = 0; i <= m; i++) {
        if (sz(nxt[i])) {
            ans1[i] = construct(nxt[i]);
        }
    }
    vector<int> ans2, ans3;
    for (auto& [x, y] : ans) {
        ans2.push_back(x);
        ans3.push_back(y);
    }
    answer(ans1, ans2, ans3);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 10.634243047199998 / 18
• Subtask 6: 29.9380575536 / 56