Submission #593086

#TimeUsernameProblemLanguageResultExecution timeMemory
593086FatihSolakUnscrambling a Messy Bug (IOI16_messy)C++17
100 / 100
7 ms616 KiB
#include <bits/stdc++.h>
#include "messy.h"
#define N 128
using namespace std;
int n;
vector<int> ans;
void add(int l,int r,set<int> s){
    if(l == r)return;
    string now="";
    for(int i = 0;i<n;i++){
        now+='0';
    }
    for(auto u:s){
        now[u] = '1';
    }
    int m = (l + r)/2;
    for(int i = l;i<=m;i++){
        assert(now[i] == '0');
        now[i] = '1';
        add_element(now);
        now[i] = '0';
    }
    set<int> a = s;
    set<int> b = s;
    for(int i = l;i<=m;i++){
        b.insert(i);
    }
    for(int i = m+1;i<=r;i++){
        a.insert(i);
    }
    add(l,m,a);
    add(m+1,r,b);
}
void get(int l,int r,set<int> s,set<int> s2){
    // cout << l << " " << r << endl;
    // for(auto u:s){
    //     cout << u << " ";
    // }
    // cout << endl;
    // for(auto u:s2){
    //     cout << u << " ";
    // }
    // cout << endl;
    if(l == r){
        ans[*s.begin()] = l;
        return;
    }
    string now="";
    for(int i = 0;i<n;i++){
        now+='0';
    }
    for(auto u:s2){
        now[u] = '1';
    }
    vector<int> v;
    for(auto u:s){
        v.push_back(u);
    }
    set<int> onl,onr;
    onr = s;
    int m = (l + r)/2;
    for(int i = l;i<=r;i++){
        assert(now[v[i - l]] == '0');
        now[v[i - l]] = '1';
        if(check_element(now)){
            onl.insert(v[i-l]);
            onr.erase(v[i-l]);
        }
        now[v[i - l]] = '0';
    }
    set<int> a = s2;
    set<int> b = s2;
    for(auto u:onr){
        a.insert(u);
    }
    for(auto u:onl){
        b.insert(u);
    }
    get(l,m,onl,a);
    get(m+1,r,onr,b);
}
vector<int> restore_permutation(int n_, int w, int r) {
    n = n_;
    add(0,n-1,{});    
    compile_set();
    ans.resize(n);
    set<int> s;
    for(int i = 0;i<n;i++){
        s.insert(i);
    }
    get(0,n-1,s,{});
    return ans;
}
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