Submission #275726

#	Time	Username	Problem	Language	Result	Execution time	Memory
275726		hamerin	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	640 KiB

messy

#include "messy.h"

#include <bits/stdc++.h>

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

using namespace std;

using i64 = long long;
using d64 = long double;
using pi = pair<int, int>;
using pli = pair<i64, i64>;
using ti = tuple<int, int, int>;
using tli = tuple<i64, i64, i64>;

#define iterall(cont) cont.begin(), cont.end()
#define prec(n) setprecision(n) << fixed

int N;
void add(int s, int e) {
    if (s == e - 1) return;

    string str(N, '1');
    for (int i = s; i < e; i++) {
        str[i] = '0';
    }

    int m = (s + e) >> 1;
    for (int i = m; i < e; i++) {
        str[i] = '1';
        add_element(str);
        str[i] = '0';
    }

    add(s, m);
    add(m, e);
}

vector<int> per;
void check(int s, int e) {
    int m = (s + e) >> 1;
    if (s == e - 1) return;

    if (e - s == N) {
        string str(N, '0');
        for (int i = 0; i < N; i++) {
            str[i] = '1';
            if (check_element(str)) per[i] = m;
            str[i] = '0';
        }
    } else {
        string str(N, '1');
        vector<int> tar;

        for (int i = 0; i < N; i++) {
            if (per[i] == s) tar.emplace_back(i);
        }

        for (auto i : tar) str[i] = '0';
        for (int i = 0; i < e - s; i++) {
            str[tar[i]] = '1';
            if (check_element(str)) per[tar[i]] = m;
            str[tar[i]] = '0';
        }
    }

    check(s, m);
    check(m, e);
}

vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    per.resize(N);
    add(0, n);
    compile_set();
    check(0, n);

    return per;
}

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