Submission #829136

#	Time	Username	Problem	Language	Result	Execution time	Memory
829136		GrindMachine	Broken Device (JOI17_broken_device)	C++17	45 / 100	41 ms	2412 KiB

Anna

// 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:
https://ivaniscoding.wordpress.com/2018/08/25/communication-3-broken-device/

*/

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

#include "Annalib.h"

void Anna( int n, long long X, int k, int a[] ){
    vector<int> blocked(n);
    rep(i,k) blocked[a[i]] = 1;

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

    int seed = 123456789;
    mt19937 rng(seed);

    shuffle(all(pos),rng);

    int bit = 0;
    vector<int> val(n);

    for(int i = 0; i < n-1; ){
        if(!blocked[pos[i]] and !blocked[pos[i+1]] and bit < 60){
            val[pos[i]] = 1;
            if(X & (1ll<<bit)) val[pos[i+1]] = 1;
            bit++;
            i += 2;
        }
        else{
            i++;
        }
    }

    rep(i,n){
        Set(i,val[i]);
    }
}

Bruno

// 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:
https://ivaniscoding.wordpress.com/2018/08/25/communication-3-broken-device/

*/

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

#include "Brunolib.h"

long long Bruno( int n, int a[] ){
    vector<int> pos(n);
    rep(i,n) pos[i] = i;

    int seed = 123456789;
    mt19937 rng(seed);

    shuffle(all(pos),rng);

    int bit = 0;
    ll ans = 0;

    for(int i = 0; i < n-1; ){
        if(a[pos[i]] == 1){
            if(a[pos[i+1]]){
                ans |= (1ll<<bit);
            }
            bit++;
            i += 2;
        }
        else{
            i++;
        }
    }

    return ans;
}

• Subtask 1: 45 / 100