Submission #107215

#	Time	Username	Problem	Language	Result	Execution time	Memory
107215		popovicirobert	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	11 ms	512 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"

using namespace std;

void divide_add(int l, int r, int n) {

    if(l == r) {
        return ;
    }

    string str;
    str.resize(n);

    for(int i = 0; i < n; i++) {
        str[i] = '1';
        if(l <= i && i <= r) {
            str[i] = '0';
        }
    }

    int mid = (l + r) / 2;

    for(int i = l; i <= mid; i++) {
        if(i != l) {
            str[i - 1] = '0';
        }
        str[i] = '1';
        add_element(str);
    }

    divide_add(l, mid, n);
    divide_add(mid + 1, r, n);

}

void divide_check(int l, int r, int n, vector <int> &sol, string &str) {

    if(l == r) {

        for(int i = 0; i < n; i++) {
            if(str[i] == '0') {
                sol[i] = l;
            }
        }

        return ;
    }

    string a, b;
    a = b = str;

    for(int i = 0; i < n; i++) {
        if(str[i] == '0') {
            str[i] = '1';

            if(check_element(str)) {
                b[i] = '1';
            }
            else {
                a[i] = '1';
            }

            str[i] = '0';
        }
    }

    int mid = (l + r) / 2;
    divide_check(l, mid, n, sol, a);
    divide_check(mid + 1, r, n, sol, b);

}

vector<int> restore_permutation(int n, int w, int r) {

    divide_add(0, n - 1, n);

    compile_set();

    vector <int> sol(n);
    string str(n, '0');

    divide_check(0, n - 1, n, sol, str);

    return sol;
}

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