Submission #565323

#	Time	Username	Problem	Language	Result	Execution time	Memory
565323		Sorting	Broken Device 2 (JOI22_device2)	C++17	80 / 100	119 ms	3548 KiB

Anna

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

using namespace std;

typedef long long ll;

static const int BITS = 60;
static const int C = 3;

static const int LEN = 178;

static mt19937 mt(1432);

int Declare() {
    return LEN;
}

static vector<int> gen_seq(){
    vector<int> v(BITS);
    for(int i = 0; i < BITS; ++i)
        v[i] = uniform_int_distribution<int>(0, 1)(mt);
    return v;
}

pair<vector<int>, vector<int>> Anna(ll a) {
    vector<int> rand_seq = gen_seq();

    vector<int> v1, v2;
    for(ll i = 0; i < LEN; i += 2){
        v1.push_back(0);
        v1.push_back(1);
    }
    vector<int> seq;
    for(ll i = 0; i < BITS; ++i){
        ll bit = (a >> i) & 1ll;
        seq.push_back(bit);
    }

    for(int i = 0; i < BITS; ++i)
        seq[i] ^= rand_seq[i];

    ll cnt = 1;
    for(ll i = 1; i <= BITS; ++i){
        if(i == BITS || seq[i] != seq[i - 1]){
            for(ll j = 0; j < 2 * cnt + 1; ++j)
                v2.push_back(seq[i - 1]);
            cnt = 0;
        }
        ++cnt;
    }

    while(v2.size() < LEN)
        v2.push_back(0);

    assert((int)v2.size() == LEN);

    return {v1, v2};
}

Bruno

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

using namespace std;

typedef long long ll;

static const int BITS = 60;
static const int C = 3;

static mt19937 mt(1432);

static vector<int> gen_seq(){
    vector<int> v(BITS);
    for(int i = 0; i < BITS; ++i)
        v[i] = uniform_int_distribution<int>(0, 1)(mt);
    return v;
}


ll Bruno(vector<int> u) {
    vector<int> rand_seq = gen_seq();

    ll curr = 0, prefix = 0, dir = 0;
    vector<ll> bits;
    for(ll i = 0; i < u.size(); ++i){
        prefix += u[i] ? 1 : -1;

        if(dir == -1 && prefix <= curr - (C - 1)){
            bits.push_back(0);
            curr -= C - 1;
            continue;
        }
        if(dir == 1 && prefix >= curr + C - 2){
            bits.push_back(1);
            curr += C - 1;
            continue;
        }

        if(prefix <= curr - C){
            bits.push_back(0);
            curr -= C;
            dir = -1;
        }
        else if(prefix >= curr + C - 1){
            bits.push_back(1);
            curr += C;
            dir = 1;
        }
    }

    ll ans = 0;
    assert(bits.size() >= BITS);
    bits.resize(BITS);
    for(int i = 0; i < BITS; ++i)
        bits[i] ^= rand_seq[i];

    for(ll i = 0; i < bits.size(); ++i)
        ans += bits[i] << i;
    return ans;
}

Compilation message (stderr)

Bruno.cpp: In function 'll Bruno(std::vector<int>)':
Bruno.cpp:26:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(ll i = 0; i < u.size(); ++i){
      |                   ~~^~~~~~~~~~
Bruno.cpp:58:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(ll i = 0; i < bits.size(); ++i)
      |                   ~~^~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 3 / 3
• Subtask 4: 12 / 12
• Subtask 5: 15 / 15
• Subtask 6: 40 / 60