Submission #825555

#	Time	Username	Problem	Language	Result	Execution time	Memory
825555		Username4132	Prisoner Challenge (IOI22_prison)	C++17	56 / 100	11 ms	1132 KiB

prison

#include "prison.h"

#include <iostream>
#include <vector>
using namespace std;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define forsn(i, s, n) for(int i=s; i<(int)n; ++i)

const int Q=27;

vector<vector<int>> devise_strategy(int n) {
  vector<vector<int>> ret(Q, vector<int>(n+1));
  forn(i, Q) ret[i][0]=((i+1)>>1)&1;
  forn(i, Q) forsn(j, 1, n+1){
    int ex = (i+1)>>1;
    int cas = (i&1);
    if((!!(j&(1<<(13 - ex)))) ^ cas){
      ret[i][j]=(cas^(ex&1))? -1 : -2;
    }
    else{
      ret[i][j] = min(2*(ex+1) - !!(j&(1<<(13 - ex - 1))), Q-1);
    }
  }
  return ret;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 46 / 90