Submission #1239568

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239568		rxlfd314	Message (IOI24_message)	C++20	29.32 / 100	530 ms	860 KiB

message

#include "message.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ari2 = array<int, 2>;
using ari3 = array<int, 3>;
using arl2 = array<ll, 2>;
using arl3 = array<ll, 3>;
template <class T> using vt = vector<T>;
#define all(x) begin(x), end(x)
#define size(x) (int((x).size()))
#define REP(a,b,c,d) for(int a=(b);(d)>0?a<=(c):a>=(c);a+=(d))
#define FOR(a,b,c) REP(a,b,c,1)
#define ROF(a,b,c) REP(a,b,c,-1)

void send_message(vt<bool> M, vt<bool> C) {
  FOR(i, 0, 30)
    send_packet(vt<bool>(31, C[i]));
  vt<int> good;
  FOR(i, 0, 30)
    if (!C[i])
      good.push_back(i);
  vt<bool> vv(31);
  FOR(i, 0, size(good)-1)
    vv[good[i]] = size(M) >> i & 1;
  send_packet(vv);
  REP(i, 0, size(M)-1, 16) {
    vt<bool> v(31);
    FOR(j, 0, min(15, size(M)-i))
      v[good[j]] = M[i + j];
    send_packet(v);
  }
}

vt<bool> receive_message(vt<vt<bool>> R) {
  vt<int> good;
  FOR(i, 0, 30)
    if (count(all(R[i]), 1) < 16)
      good.push_back(i);
  int sz = 0;
  FOR(i, 0, size(good)-1)
    sz |= R[31][good[i]] << i;
  vt<bool> ret;
  FOR(i, 32, size(R) - 1)
    for (const auto &j : good)
      if (size(ret) < sz)
        ret.push_back(R[i][j]);
  return ret;
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 19.3175 / 90