Submission #1312640

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312640		settop	Unscrambling a Messy Bug (IOI16_messy)	C++20	39 / 100	1 ms	568 KiB

messy

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

using namespace std;
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ll long long
#define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
#define fall(i,a,b) for(int i=a;i<=b;i++)
#define rfall(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define sz(x) (int)x.size()
typedef pair<ll,ll> pii;

int n,cur=1;
vector<int> p,rev;

void build(int l,int r){
    if(l==r) return;
    int m=(l+r)/2;
    if(m<=7) build(m+1,r);
    else{
        string s="";
        fall(i,0,n-1) s+="1";
        fall(j,0,cur-2) s[j]='0';
        
        fall(i,l,m){
            if(i<=7) continue;
            s[i]='0';
            add_element(s);
            s[i]='1';
        }
        cur++;
        build(l,m);
        build(m+1,r);
    }
}

void walk(int l,int r,vector<int> v){
    if(l==r){
        p[v[0]]=l;
        rev[l]=v[0];
        return;
    }
    int m=(l+r)/2;
    if(m<=7) walk(m+1,r,v);
    else{
        vector<int> g1,g2;
        string s="";
        fall(i,0,n-1) s+="1";
        fall(j,0,cur-2) s[rev[j]]='0';

        for(auto u:v){
            s[u]='0';
            if(check_element(s)) g1.pb(u);
            else g2.pb(u);
            s[u]='1';
        }
        cur++;
        walk(l,m,g1); walk(m+1,r,g2);
    }
}

std::vector<int> restore_permutation(int N, int lx, int lx2){
    n=N;
    string s="";

    p.resize(n,-1); rev.resize(n);

    fall(i,0,n-1) s+="0";

    fall(i,0,7){
        s[i]='1';
        add_element(s);
    }

    build(0,n-1);

    compile_set();

    fall(i,0,7) s[i]='0';

    fall(j,0,7){
        fall(i,0,n-1){
            if(p[i]!=-1) continue;
            s[i]='1';
            if(check_element(s)){
                p[i]=j;
                rev[j]=i;
                break;
            }
            s[i]='0';
        }
    }

    vector<int> candidates;

    fall(i,0,n-1) if(p[i]==-1) candidates.pb(i);
    
    cur=1;
    walk(0,n-1,candidates);

    return p;
}

Compilation message (stderr)

messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 0 / 20
• Subtask 2: 18 / 18
• Subtask 3: 0 / 11
• Subtask 4: 21 / 21
• Subtask 5: 0 / 30