Submission #1094954

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094954		steveonalex	Parrots (IOI11_parrots)	C++17	99 / 100	64 ms	28864 KiB

encoder

#include <bits/stdc++.h>
#include "encoder.h"
#include "encoderlib.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * 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());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
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 container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }


vector<vector<int>> state;
const int MA = 8, P = 11;
void generate_state(){
    if (state.size()) return;
    state.push_back({});
    for(int i = 0; i < MA; ++i){
        vector<vector<int>> cur;
        for(vector<int> j: state){
            while(j.size() <= P){
                cur.push_back(j);
                j.push_back(i);
            }
        }
        state = cur;
    }
    sort(ALL(state));
}
 
void encode(int N, int M[]){
    generate_state();
    vector<int> a((N + 1) / 2);
    for(int i= 0; i< N; ++i){
        a[i / 2] += M[i] * MASK((i % 2) * 8);
    }
    for(int i = 0; i < a.size(); ++i){
        for(int j: state[a[i]]) send(j + MA * i);
    }
}

decoder

#include <bits/stdc++.h>
#include "decoder.h"
#include "decoderlib.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * 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());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
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 container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }
 

vector<vector<int>> state;
const int MA = 8, P = 11;
void generate_state(){
    if (state.size()) return;
    state.push_back({});
    for(int i = 0; i < MA; ++i){
        vector<vector<int>> cur;
        for(vector<int> j: state){
            while(j.size() <= P){
                cur.push_back(j);
                j.push_back(i);
            }
        }
        state = cur;
    }
    sort(ALL(state));
}

 
void decode(int N, int L, int X[]){
    generate_state();
    vector<int> ans(N + 1);
    vector<vector<int>> cur((N + 1) / 2);
    for(int i = 0; i < L; ++i){
        cur[X[i] / 8].push_back(X[i]);
    }
    for(int i = 0; i < cur.size(); ++i){
        sort(ALL(cur[i]));
        for(int &j: cur[i]) j -= i * MA;
        int idx = lower_bound(ALL(state), cur[i]) - state.begin();
        ans[i * 2] = idx % MASK(8);
        ans[i * 2 + 1] = idx / MASK(8);
    }

    while(ans.size() > N) ans.pop_back();
    for(int i: ans) output(i);
}

Compilation message (stderr)

encoder.cpp: In function 'void encode(int, int*)':
encoder.cpp:82:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     for(int i = 0; i < a.size(); ++i){
      |                    ~~^~~~~~~~~~

decoder.cpp: In function 'void decode(int, int, int*)':
decoder.cpp:84:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |     for(int i = 0; i < cur.size(); ++i){
      |                    ~~^~~~~~~~~~~~
decoder.cpp:92:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   92 |     while(ans.size() > N) ans.pop_back();
      |           ~~~~~~~~~~~^~~

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 29 / 29
• Subtask 5: 18 / 19