Submission #1121762

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121762		HasanV11010238	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	768 KiB

messy

#include <vector>
#include <iostream>
using namespace std;
#include "messy.h"
void build(int l, int r, string s){
    if (l == r){
        return;
    }
    int mid = (l + r) / 2;
    string s1 = s, s2 = s;
    for (int i = l; i <= mid; i++){
        s[i] = '1';
        add_element(s);
        s[i] = '0';
    }
    for (int i = l; i <= mid; i++){
        s1[i] = '1';
    }
    for (int i = mid + 1; i <= r; i++){
        s2[i] = '1';
    }
    build(l, mid, s2);
    build(mid + 1, r, s1);
}
vector<int> ans;
int N, cnt = 0;
void find(int l, int r, string s){
    if (l == r){
        for (int i = 0; i < N; i++){
            if (s[i] == '0'){
                ans[i] = l;
                return;
            }
        }
        return;
    }
    int mid = (l + r) / 2;
    string s1 = s, s2 = s;
    vector<int> le(N + 1, 0);
    for (int i = 0; i < N; i++){
        if (s[i] == '0'){
            s[i] = '1';
            int ask = check_element(s);
            if (ask == 1){
                le[i] = 1;
            }
            s[i] = '0';
        }
    }
    for (int i = 0; i < N; i++){
        if (s[i] == '0'){
            if (le[i] == 1){
                s1[i] = '1';
            }
            else{
                s2[i] = '1';
            }
        }
    }
    find(l, mid, s2);
    find(mid + 1, r, s1);
}
vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    ans.assign(n, 0);
    string s = "";
    for (int i = 0; i < n; i++) s += "0";
    build(0, n - 1, s);
    compile_set();
    for (int i = 0 ; i < n; i++) s[i] = '0';
    find(0, n - 1, s);
    return ans;
}

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