Submission #1121705

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121705		coolboy19521	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	764 KiB

messy

#include"bits/stdc++.h"
#include"messy.h"
using namespace std;

int N;

void gen(int l, int r) {
    if (l < r) {
        string s(N, '0');
        for (int i = 0; i < l; i ++) {
            s[i] = '1';
        }
        for (int i = r + 1; i < N; i ++) {
            s[i] = '1';
        }
        int mi = (l + r) / 2;
        for (int i = l; i <= mi; i ++) {
            s[i] = '1';
            add_element(s);
            s[i] = '0';
        }
        gen(l, mi);
        gen(mi + 1, r);
    }
}

const int mxN = 128;

using vi = vector<int>;
using si = set<int>;

si fine;
si ban;
vi ans;

void revert(si& tmp) {
    for (int i : fine) {
        ban.insert(i);
    }
    for (int i : tmp) {
        ban.erase(i);
    }
    fine.clear();
    for (int i : tmp) {
        fine.insert(i);
    }
}

void go(int l, int r) {
    if (l == r) {
        ans[*begin(fine)] = l;
    } else if (l < r) {
        string S(N, '0');
        for (int i : ban) {
            S[i] = '1';
        }
        si tmp;
        for (int i : fine) {
            S[i] = '1';
            if (!check_element(S)) {
                ban.insert(i);
                tmp.insert(i);
            }
            S[i] = '0';
        }
        for (int i : ban) {
            fine.erase(i);
        }
        int mi = (l + r) / 2;
        go(l, mi);
        revert(tmp);
        go(mi + 1, r);
    }
}

vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    gen(0, N - 1);
    compile_set();

    for (int i = 0; i < N; i ++) {
        fine.insert(i);
    }

    ans.assign(N, 0);
    go(0, N - 1);

    return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30