Submission #1244349

#	Time	Username	Problem	Language	Result	Execution time	Memory
1244349		steveonalex	Message (IOI24_message)	C++20	10 / 100	480 ms	844 KiB

message

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned int ul;
typedef unsigned long long ull;

#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll gcd(ll a, ll b){return __gcd(a, b);}
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}

ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}

// mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T the_array_itself, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: the_array_itself) out << item << separator;
        out << finish;
    }

template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

#include "message.h"

void send_message(vector<bool> M, std::vector<bool> C){
    vector<int> pos;
    for(bool i: C) {
        send_packet(vector<bool>(31, i));
    }

    for(int i = 0; i < 31; ++i) if (C[i] == 0)
        pos.push_back(i);

    vector<bool> vro;
    for(int i = 0; i < 10; ++i) vro.push_back(GETBIT(M.size(), i));
    for(bool i: M) vro.push_back(i);

    while(vro.size() % 16) vro.push_back(0);

    if (vro.size() / 16 + 31 >= 100) assert(false);
    
    for(int i = 0; i < (int)vro.size(); i += 16){
        vector<bool> cur(31);
        for(int j = 0; j < 16; ++j){
            cur[pos[j]] = vro[i + j];
        }

        send_packet(cur);
    }
}

vector<bool> receive_message(vector<vector<bool>> R){
    vector<bool> C(31);
    for(int i = 0; i< 31; ++i){
        int cnt = 0;
        for(int j: R[i]) cnt += j;

        if (cnt > 15) C[i] = 1;
    }

    vector<bool> vro;
    for(int i = 31; i < (int) R.size(); ++i){
        for(int j = 0; j < 31; ++j) if (C[j] == 0)
            vro.push_back(R[i][j]);
    }

    int sz = 0;
    for(int i = 0; i < 10; ++i) if (vro[i]) sz += MASK(i);
    while(vro.size() > sz + 10) vro.pop_back();

    vector<bool> message;
    for(int i = 10; i < (int) vro.size(); ++i) message.push_back(vro[i]);

    return message;
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 0 / 90