Submission #761200

#	Time	Username	Problem	Language	Result	Execution time	Memory
761200		GrindMachine	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	468 KiB

messy

// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

refs:
edi

*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

#include "messy.h"

int n;

void build(int l, int r){
    if(l >= r) return;

    string s(n,'0');
    rep(i,n){
        if(i >= l and i <= r){
            s[i] = '0';
        }
        else{
            s[i] = '1';
        }
    }

    int mid = (l+r) >> 1;

    for(int i = l; i <= mid; ++i){
        s[i] = '1';
        add_element(s);
        s[i] = '0';
    }

    build(l,mid);
    build(mid+1,r);
}

vector<int> p;

void go(int l, int r, vector<int> a){
    if(l > r) return;

    if(l == r){
        assert(sz(a) == 1);
        p[a[0]] = l;
        return;
    }

    string s(n,'1');
    trav(i,a) s[i] = '0';

    int mid = (l+r) >> 1;

    vector<int> v1, v2;

    trav(i,a){
        s[i] = '1';
        if(check_element(s)){
            v1.pb(i);
        }
        else{
            v2.pb(i);
        }
        s[i] = '0';
    }

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

vector<int> restore_permutation(int n_, int w, int r) {
    n = n_;
    build(0,n-1);
    compile_set();
    
    p.resize(n);

    vector<int> a(n);
    rep(i,n) a[i] = i;

    go(0,n-1,a);
        
    return p;
}

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