Submission #769887

#	Time	Username	Problem	Language	Result	Execution time	Memory
769887		ZeroCool	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	3 ms	468 KiB

messy

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

using namespace std;

typedef long long int ll;

const int mxn = 3e5 + 5;

int n;
bool in[mxn];

void run(){
    string s;
    for(int i = 0;i<n;i++)s += char('0' + in[i]);
    add_element(s);
}

bool get(){
    string s;
    for(int i = 0;i<n;i++)s += char('0' + in[i]);
    return check_element(s);
}

void gen(int l,int r){
    if(l >= r)return;
    int mid = (l+r)/2;
    for(int i = 0;i<n;i++)in[i] = true;
    for(int i = l;i<=r;i++)in[i] = false;
    for(int i = mid+1;i<=r;i++){
        in[i] = true;
        run();
        in[i] = false;
    }
    gen(l,mid);
    gen(mid+1,r);
}

vector<int> ans;

void ask(int l,int r, vector<int> v){
    if(l == r){
        ans[v[0]] = l;
        return;
    }
    int mid = (l+r)/2;
    for(int i = 0;i<n;i++)in[i] = true;
    for(auto p : v)in[p] = false;
    vector<int> v1;
    vector<int> v2;
    for(auto p : v){
        in[p] = true;
        if(get())v2.push_back(p);
        else v1.push_back(p);
        in[p] = false;
    }

    ask(l, mid, v1);
    ask(mid+1,r,v2);
}

vector<int> restore_permutation(int N, int w, int r) {
    n = N;
    ans.resize(n);
    gen(0,n-1);
    compile_set();
    vector<int> v;
    for(int i = 0;i<n;i++)v.push_back(i);
    ask(0,n-1,v);
    return ans;
}

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