Submission #1234808

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234808		guanex	Parrots (IOI11_parrots)	C++20	0 / 100	1 ms	840 KiB

encoder

#include "encoder.h"
#include "encoderlib.h"

#include<bits/stdc++.h>
using namespace std;

int timer = 0;
map<int, vector<int>> m;

void dfs(vector<int> &x){
  m[timer] = x;
  timer++;
  if((int)x.size() == 7){
    return;
  }
  int last = x[(int)x.size()-1];
  for(int i = last; i <= 3; ++i){
    x.push_back(i);
    dfs(x);
    x.pop_back();
  }
}

void encode(int N, int M[])
{
  int n = N;
  timer = 0;
  vector<int> x = {0};
  dfs(x);
  x = {1};
  dfs(x);
  x = {2};
  dfs(x);
  x = {3};
  dfs(x);
  vector<vector<int>> vec(n);
  for(int i = 0; i < n; ++i){
    vec[i] = m[M[i]];
  }
  for(int i = 0; i < n; ++i){
    for(auto e:vec[i]){
      int num = i;
      if(e & 1){
        num += 64;
      }
      if(e & 2){
        num += 128;
      }
      send(num);
    }
  }
}

decoder

#include "decoder.h"
#include "decoderlib.h"

#include<bits/stdc++.h>
using namespace std;

int timer = 0;
map<vector<int>, int> m;

void dfs(vector<int> &x){
  m[x] = timer;
  timer++;
  if((int)x.size() == 7){
    return;
  }
  int last = x[(int)x.size()-1];
  for(int i = last; i <= 3; ++i){
    x.push_back(i);
    dfs(x);
    x.pop_back();
  }
}


void decode(int N, int L, int X[])
{
  int n = N;
  timer = 0;
  vector<int> x = {0};
  dfs(x);
  x = {1};
  dfs(x);
  x = {2};
  dfs(x);
  x = {3};
  dfs(x);
  vector<vector<int>> vec(n);
  for(int i = 0; i < L; ++i){
    int pos = 0;
    for(int i = 0; i < 6; ++i){
      if(X[i] & i){
        pos += (1 << i);
      }
    }
    int num = 0;
    if(X[i] & 64){
      num++;
    }
    if(X[i] & 128){
      num++;
    }
    vec[pos].push_back(num);
  }
  for(auto e:vec){
    int ans = m[e];
    output(ans);
  }
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 18
• Subtask 4: 0 / 29
• Subtask 5: 0 / 19